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The human operator, the least reliable element of an aerodyne, but the most essential...!
Frank Caron (1991)


Last update:
26 September 2016

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Nice to know - ATA Specifications 100 Codes

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Codes
ATA Specifications 100
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5
TIME LIMITS/MAINTENANCE CHECKS
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6
DIMENSIONS AND AREAS
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7
LIFTING AND SHORING
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8
LEVELING AND WEIGHING
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9
TOWING AND TAXIING
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10
PARKING AND MOORING
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11
--
12
AIRFRAME
20
STANDARD PRACTICES – AIRFRAME
AIRFRAME
21
AIRFRAME
22
AIRFRAME
23
AIRFRAME
24
AIRFRAME
25
AIRFRAME
26
AIRFRAME
27
AIRFRAME
28
AIRFRAME
29
AIRFRAME
30
AIRFRAME
31
AIRFRAME
32
AIRFRAME
33
AIRFRAME
34
AIRFRAME
35
--
Codes
ATA Specifications 100
AIRFRAME
36
AIRFRAME
37
AIRFRAME
38
AIRFRAME
45
AIRFRAME
49
STRUCTURE
51
STRUCTURE
52
STRUCTURE
53
STRUCTURE
54
STRUCTURE
55
STRUCTURE
56
STRUCTURE
57
ENGINE
71
ENGINE
72
ENGINE
73
ENGINE
74
ENGINE
75
ENGINE
76
ENGINE
77
ENGINE
78
ENGINE
79
ENGINE
80
ENGINE
82
ENGINE
83

1100 Placards and Markings
For reports on all placards, decals, and markings installed by the manufacturer including those required by government regulations. The report should include the system or component involved. The aircraft make and model is required. The location of the item is essential for a meaningful report. Such information should be extracted from the text and entered in the proper data fields.

(Example: Item = placard; location = entrance door; part condition = missing. Text = the "closed and locked" decal is missing from the main passenger entrance door).

1210 Fuel Servicing
For reports indicating a problem relating to any type of aviation fuel. The general instructions are not applicable to any particular system.

1220 Oil Servicing
For reports indicating a problem relating to aviation lubricating oil. The general instructions are not applicable to any particular system.

1230 Hydraulic Fluid Servicing
For reports which indicate a problem with any type of hydraulic fluid. The general instructions are not applicable to any particular system.

1240 Coolant Servicing
For reports indicating a problem with any type of engine coolant used in aircraft. The general instructions are not applicable to any particular system.


2100 Air Conditioning System
For miscellaneous parts that cannot be associated with specific air conditioning, pressurization, or distribution codes.

Examples are lines, hoses, etc., with no reference to the specific using system on the incoming report. Also, for those units and components furnishing a means of pressurizing, heating, cooling, moisture controlling, filtering, and treating the air used to ventilate areas of the fuselage within the pressure vessel.

2110 Cabin Compressor System
The system and its controls supplying compressed air to the cabin. For reported problems with the compressor unit and not the associated system. Related entries should include the component manufacturer's make, model, and the specific defective part by name and part number. Typical parts are controls and indicating systems related to the compressors, wiring, etc.

2120 Air Distribution System
The system used to induct and distribute air. Does not include valves that are a part of the temperature control, pressurization, or the distribution fan. Typical parts are equipment rack cooling systems, ozone converters, scoops, ducting, inlets, check valves, wiring, etc.

2121 Air Distribution Fan
For reports pertaining to the fan/blower including associated motor which distributes air within the confine for comfort or equipment cooling. Typical parts are bearing, bushing, motor, etc.

2130 Cabin Pressure Control System
For reports of miscellaneous system components or parts other than the controller, indicator, sensor, regulator, or outflow valves. Typical parts are amplifier, switch, electrical connector, etc.

2131 Cabin Pressure Controller
For the reports pertaining to the controller units only and not for the system. The defective part should be identified by the part name and part number whenever possible.

2132 Cabin Pressure Indicator
For reports of the cabin pressurization system, pressure indicators, and associated system parts.

2133 Pressure Regulator/Outflow Valve
For reports of outflow/dump valves and associated parts such as linkage, filter, diaphragm, etc.

2134 Cabin Pressure Sensor
The units and systems which measure differential pressure and transmit a signal. Typical parts are pressure switch, transducer, etc.

2140 Heating System
The units and systems supplying heated air to the cockpit or cabin. Includes the heat source (heater), controlling aspects, and temperature sensors/indicators. Typical parts are fuel pump, filter, plumbing, circuitry, relay, heat exchanger, igniter, etc.

2150 Cabin Cooling System
The units and systems supplying cooled air to the cockpit or cabin. Does not include the temperature control and indicating system. Typical parts are flow valve, relay, condenser, ram air sensor, heat exchanger, cooling turbine, air cycle machine, etc.

2160 Cabin Temperature Control System
The units and circuitry other than the control unit which are used for controlling the temperature of the air in the cockpit and cabin. Typical parts are control valves, thermal sensing devices, switches, amplifiers, and wiring.

2161 Cabin Temperature Controller
For reports of the parts within the cabin temperature control unit. A typical entry would only reference the "control unit" if specific part numbers are not available.

2162 Cabin Temperature Indicator
For reports of the indicators, lamps and associated circuitry which indicates the air temperature in the cabin.

2163 Cabin Temperature Sensor
For reports of the sensors and associated circuitry sensing the temperature of the air in the cabin and relays a signal to the indicator.

2170 Humidity Control System
For reports of system parts that control humidity. Typical parts are bag, sock, filter, moisture separator, etc.


2200 Auto Flight System
The units and components that furnish a means of automatically controlling flight of the aircraft. Includes those units and components controlling direction, heading, attitude, altitude, and speed. Use this code when there is insufficient information to file in a more specific JASC 2200 series code.

2210 Autopilot System
For reports of miscellaneous parts associated with the autopilot system used for controlling attitude and direction. Typical parts are yaw damper, cable, switch, sensor, relay, etc. The major components such as computer, servo, and controller are to be filed in the specific JASC 2200 series code.

2211 Autopilot Computer
For reports pertaining to the autopilot computer only. Typical parts are resistor, circuit board, capacitor, or power supply, etc.

2212 Altitude Controller
The units transmitting output information signals to automatically maintain a predetermined altitude, rate of climb, or descent. Does not include the connecting system parts such as the sensor switch. The controller make and model should be included.

2213 Flight Controller
The command unit of an autopilot system. It is manually operated to generate signals which cause the aircraft to climb, dive, or perform coordinated turns. The controller make and model should be included.

2214 Autopilot Trim Indicator
The instrument and associated circuitry that indicates the trim position selected by the pilot.

2215 Autopilot Main Servo
The unit mechanically connected to primary flight control actuating mechanisms which is used to mechanically reposition control surfaces in accordance with electrical or pneumatic signals from a controller.

2216 Autopilot Trim Servo
The units mechanically connected to flight control cables, etc., for making minor corrections in aircraft attitude or direction.

2220 Speed-Attitude Correction System
The system which automatically maintains safe flight conditions by correcting for effects of speed and out-of-trim conditions by such means as automatic trim, mach trim, or speed stability and mach feel. This includes sensing, computing, actuating, indicating, internal monitoring, warning devices, etc.

2230 Auto Throttle System
The system that automatically controls the position of the throttles to properly manage engine power during all phases of flight/attitude. This includes engaging, sensing, computing, amplifying, controlling, actuating and warning devices. Typical parts are amplifiers, computers, servos, limit switches, clutches, gearboxes, warning lights, etc.

2250 Aerodynamic Load Alleviating
The system that automatically corrects and provides for gust loading/upset, aerodynamic augmentation, alleviation, suppression, ride control, etc. This includes sensing, computing, actuating, indicating, internal monitoring, warning devices, etc.


2300 Communications System
The units and components furnishing a means of communicating from one part of the aircraft to another and between the aircraft or ground stations, includes voice, data, continuous wave (C W) communicating components, passenger announcement systems, intercom, inflight telephones, and tape reproducers record player. Use this code when insufficient information is reported to file in a more specific JASC 2300 series code. Also for reports of units or parts common to more than one communication system.

2310 HF Communications System
The system parts and circuitry including the receiver, transmitter, and antenna used exclusively in the high frequency (HF) communications.

2311 UHF Communications System
The system parts and circuitry including the receiver, transmitter, and antenna used exclusively for ultra high frequency (UHF) communications.

2312 VHF Communications System
The system parts and circuitry including the receiver, transmitter, and antenna used exclusively for very high frequency (VHF) communications.

2320 Data Transmission Auto Call
The system components and parts which presents data derived from pulse coded transmissions. Includes "selective calling" (SELCAL), "aircraft communications addressing and reporting system" (ACARS), teleprinter, etc.

2330 Entertainment System
For reports on passenger entertainment system or components such as amplifier, cassette recorder player, control panel, speaker, video equipment, etc.

2340 Interphone/Passenger Announcement (PA) System
For reports on the interphone/passenger announcement (PA) system, including the amplifier used for communication by flight and ground personnel to communicate between areas on the aircraft.

2350 Audio Integrating System
For reports of the system components and parts including the control panel and amplifier which controls output of communications and navigation receivers into flight crew headphones and speakers. Also includes output from microphones into communications transmitters. Typical parts are microphones, cockpit speakers, and headphones, etc.

2360 Static Discharge System
The parts dissipating static electricity. Does not include bonding straps on engine or airframe used to assure paths for DC current which are filed in JASC code 2430. Typical parts are wick, bonding strap, etc.

2370 Audio/Video Monitoring
For reports on installations that record or monitor crew or passenger conversation or movement for security or safety purposes. Includes voice recorder, television, monitor, etc.


2400 Electrical Power System
The electrical units and components that generate, control, and supply AC/DC electrical power for other systems through the secondary busses. For reports on electric power generating system parts and circuitry other than major components reported with insufficient information to file in a specific JASC 2400 series code. Typical parts are circuit breaker, relay, connector, resister, wire bundles, switches, etc.

2410 Alternator-Generator Drive
For reports on alternator and generator drives mounted on reciprocating "opposed" type engines. Does not include alternator cases. Typical parts are bracket, pulley, belt, link, idler pulley, bolt, drive shaft and gears that stay with the alternator. Also for reports on constant speed drive (CSD) unit mounted on turbine engines to drive alternating current (AC) producing alternators at a predetermined and constant RPM. Typical parts are shaft seal, shaft, etc.

2420 AC Generation System
For reports of system parts other than the alternator, regulator, AC inverter or phase adapter generating an alternating current for aircraft which incorporate an alternating current electrical system. Used primarily with large, turbine engine powered aircraft. Does not include the using systems.

2421 AC Generator-Alternator
The engine driven component that generates alternating current (AC) for aircraft with AC electrical systems. Does not include AC alternators on light piston engine power aircraft with direct current (DC) electrical systems. Does not include single units used for both engine starting and electric power generating. Typical parts are bearing, shaft, housing, and integrated drive generator (IDG) which contains both AC and DC generators.

2422 AC Inverter
The component which converts direct current to alternating current.

2423 Phase Adapter
The component used to change the alternating current (AC) phase of output for specific using equipment.

2424 AC Regulator
The component that regulates the AC voltage from the alternator-generator to maintain a set voltage output for the using systems (i.e., generator control unit).

2425 AC Indicating System
The equipment indicating, voltage, current flow, and system faults in the AC power systems.

2430 DC Generating System
The system parts and circuitry other than the generator/alternator and DC generation system regulator used to generate a direct current (DC); or from an alternator, the output of which is rectified to DC. Typical parts are relay, switch, connector, terminal, sensor, reverse current relay, etc. Such systems are more prevalent on light single and twin engine aircraft.

2431 Battery Overheat Warning System
The system parts that sense and warn/indicate of a battery over-temperature condition. Typical parts are sensor, lamp, gauge, etc.

2432 Battery/Charger System
The component providing a source of DC voltage and current flow independent of rotating generators and alternators. Typical parts are battery charger, cell, case, post, etc.

2433 DC Rectifier/Converter
The component which converts AC current for the using systems.

2434 DC Generator-Alternator
The engine driven component generating a direct current (DC) or a rectified alternating current for aircraft with DC electrical systems. For reports of alternators on light aircraft with piston engines. Does not include mounting brackets, drive belts and pulleys external to the unit. Typical parts are bearing, housing, coupling, fan, capacitor, drive, brush, seal, clutch, armature and bell, shaft, field winding, case bolt, ground stud, etc.

2435 Starter
Generator The single component used for both engine starting and direct current generation on turbine engines. Typical parts are bearing, shaft, brush, fan, retainer ring, armature, brush, housing, end bell, terminal, etc.

2436 DC Regulator
The component that regulates direct current voltage from a generator or alternator.

2437 DC Indicating System
The equipment indicating voltage, current flow, and system faults in the DC power systems.

2440 External Power System
The electrical system within the aircraft connecting external power to the aircraft's electrical system. Typical parts are receptacle, switch, indicator lamp, etc.

2450 AC Power Distribution System
The electrical system providing for connection of AC power to using systems. Does not include the using system. Typical parts are main and secondary system buss, circuit breaker, limiter, jumper, load meter switch, etc.

2460 DC Power Distribution System
The electrical system which provides for connection of DC power to using systems. Does not include using system. Typical parts are main and secondary system buss, circuit breaker, buss tie breaker, limiter, jumper, load motor switch, etc.


2500 Cabin Equipment/Furnishings
The removable items of equipment and furnishings mounted or contained in the flight, passenger, cargo, accessory compartments, and areas described in other JASC 2500 series codes shown below. Does not include structure or equipment assigned specifically to other JASC codes.

2510 Flight Compartment Equipment
The removable equipment and furnishings within the cockpit or crew station of a general nature and not specifically covered in other JASC 2500 series codes. Typical parts are seats, shoulder harnesses, take up harness reels, seat belts, sun visors, panels, map case, attach brackets and hardware, etc.

2520 Passenger Compartment Equipment
The removable equipment and furnishings within the cabin of a general nature and not specifically covered in other JASC codes. Typical parts are seats, seat belts, hat rack, coat closet, panel, including passenger comfort items such as personal blankets, pillows, etc.

2530 Buffet/Galleys
For reports pertaining to any of the galley equipment. Typical parts are hot plate, coffee pot, food carts, ovens, tray, pad, relay, switch, connector, dispenser, etc.

2540 Lavatories
The units and associated systems and parts located in lavatories. Does not include wash basins and other waste disposal items in JASC code 3830. Typical parts are trash containers, dispensers, etc.

2550 Cargo Compartments
The compartments for the storage of baggage and cargo including external mounted pods. Does not include the exterior door, hinges and latches which are filed in JASC code 5230. Typical parts are tie downs, restraint nets, and equipment for loading and unloading cargo (includes rotorcraft cargo handling equipment).

2551 Agricultural Spray System
For reports of aerial application equipment such as hopper, tank, spray nozzle, boom, pump, bracket, valve.

2560 Emergency Equipment
The components, parts, and systems carried for emergency use other than those specifically referenced in other JASC 2500 series codes. Does not include fire extinguishes, oxygen equipment, and flashlight. Flashlights are filed under JASC code 3350. Escape slide girt bars are filed under this code.

2561 Life Jacket
For reports of defective parts of life jackets used for flotation of individual persons. Include the life jacket make and model in the report if available.

2562 Emergency Locator Beacon
The components transmitting an electronic signal on an emergency frequency to assist in locating a crashed aircraft. Typical parts are impact switch, antenna, battery pack, etc.

2563 Parachute
For the reporting of defective parts of parachutes used for reducing landing roll distance as well as for personnel jumping. The parachute make and model is beneficial if available.

2564 Life Raft
The inflatable component which provides emergency flotation for two or more persons in event of ditching in water. Typical parts are bottle, valve, oral pump, etc.

2565 Escape Slide
The inflatable component which enables rapid evacuation from an aircraft cabin to ground level during emergencies on the ground. The slide should be identified by make and model if possible and should include location. Typical parts are valve, bottle, inflation handle, mount brackets, door, latch, etc.

2570 Accessory Compartment
The compartments for the housing of various components or accessories with insufficient information to file in a more specific JASC 2500 series code.

2571 Battery Box Structure
The structure supporting, vents, and provides overboard draining for aircraft batteries. Typical parts are vent cap, drain tube, insulator, cover, etc.

2572 Electronic Shelf Section
The shelves and attaching parts supporting the electronic equipment within the fuselage. Does not include the equipment used for equipment cooling such as fans, and blower motors.


2600 Fire Protection System
The fixed and portable units and components which detect and indicate fire or smoke, and store and distribute fire extinguishing agent to all protected areas of the aircraft. For reports of a general nature with insufficient information to file in a more specific JASC 2600 series code.

2610 Detection System
The system used to sense and indicate the presence of overheat or fire in all protected areas. Reporting the specific location of the defective part is essential. Use this code when there is insufficient information to file in a more specific JASC 2610 series code.

2611 Smoke Detection
The system used to sense and indicate the presence of smoke in all protected areas of the aircraft. Reporting the specific location of a defective part is essential. Typical parts are detector, sensor, wiring, relay, amplifier, test circuit, etc.

2612 Fire Detection
The system used to sense and indicate the presence of fire in all protected areas of the aircraft. Typical parts are detector, sensor, wiring, relay, amplifier, test circuit, etc. Reporting the specific location of a defective part is essential.

2613 Overheat Detection
The system used to sense and indicate the presence of an overheat condition in all protected areas of the aircraft. Reporting the specific location of a defective part is essential. Typical parts are detector, sensor, wiring, relay, amplifier, test circuit, etc.

2620 Extinguishing System
For reports of the components and parts other than the fixed or portable bottles used to extinguish fire. Typical parts are valve, squib, control module, switch, tubing, etc.

2621 Fire Bottle, Fixed
The fixed fire bottle and associated parts that store extinguishing agent under pressure. Typical parts are bottle, cartridge, bracket.

2622 Fire Bottle, Portable
The portable fire extinguishes mounted within the flight compartment and cabin.


2700 Flight Control System
The units and components furnishing a means of manually controlling the flight attitude characteristics of the aircraft. Also includes the functioning and maintenance aspects of the flaps, spoilers and other control surfaces, but does not include the structure which is covered in the Structures JASC Chapters 55 or 57. Use this code for reports of flight control problems of a general nature involving two or more systems, or that contain insufficient information to file in a more specific JASC 2700 series code. An example would be a cable defect reported without reference to the using system or an interconnect between two systems. Does not include rotorcraft flight controls which are covered in the JASC Rotor Chapter 67. Typical parts are hydraulic boost system, controls, mounting brackets, etc.

2701 Control Column Section
The component and associated parts mounted onto the control wheel which transmits motion from the cockpit to connecting cables, pushrods, etc., to actuate the aileron and elevator, stabilator, ruddervator control surfaces. Includes control sticks in aircraft not equipped with control wheels. Typical parts are bearing, socket, guide, bushing, pulley bracket, sprocket, chain, stops, etc.

2710 Aileron Control System
The system components and parts from the control column to the aileron surface that cause actuation (deflection). Includes manual and power assisted systems but does not include the autopilot actuation mechanism which is filed in JASC Chapter 22. Also includes brackets for the support or attachment of pulleys, pushrods, and bellcranks. Does not include control surface hinges or structure filed in JASC code 5700. Typical parts are actuator, valve, rod end, pulley, cable, bellcrank, turnbuckle, stops, etc.

2711 Aileron Tab Control System
The system components and parts controlling movement and position of the trim tab on the aileron. Includes the cockpit control. Typical parts are jackscrew, cable, pulley, turnbuckle, stops, etc.

2720 Rudder Control System
The system components and parts from the cockpit pedals to the rudder surface which cause movement. Includes manual and power assisted systems other than the actuator and autopilot actuating mechanism. Also includes brackets for the support or attachment of pulleys, pushrods, and bellcranks. Does not include control surface hinges or structure (filed in JASC code 5540) or the yaw dampers (filed in JASC code 2210). Typical parts are cable, rod end, turnbuckle, bolt, pedal, spring, torque tube, control valve, stops, etc.

2721 Rudder Tab Control System
The system components and parts of the rudder trim control system, from the cockpit control to the rudder that causes deflection. Does not include hinges or structure which are filed in JASC code 5543, or the yaw dampers which are filed in JASC code 2210. Typical parts are actuator, actuator bracket, cable, pulley, chain, rod end, bellcrank, etc.

2722 Rudder Actuator
The system components and parts which actuate the rudder. Typical parts are motor, actuator, actuator bracket, jackscrew, rod-end, seals, etc.

2730 Elevator Control System
The system components and parts including actuator from the control column to the elevators that cause movement. Includes control actuating mechanism for "ruddervators" installed on "V" tail aircraft. Does not include hinges, structure, and balance weights filed in JASC code 5520, or the auto-pilot servo in JASC code 2216. Typical parts are torque tube, cable, rod end, stops, actuator, feel computer, bracket, control valve, etc.

2731 Elevator Tab Control System
The system components and parts from the cockpit trim control to the elevator, ruddervator or stabilator tab, which controls position and movement. Includes the manual and electrical trim system parts. Does not include the hinges or structure which are filed in JASC code 5520; the balance weights in JASC code 5520; or the autopilot servo in JASC code 2216. Typical parts are jackscrew, cable, actuator, sensor, motor, chain, sprocket, indicator, etc.

2740 Stabilizer Control System
The system components and parts from the cockpit control to the stabilizer, except the actuator which controls position of the horizontal stabilizer for pitch trim (usually found on high performance turbine powered aircraft). Also for stabilator control systems on aircraft utilizing a single horizontal tail surface for both the stabilizer and elevator. Does not include structure in JASC code 5511. Typical parts are cable, bellcrank, pulley, control valve, indicator, etc.

2741 Stabilizer Position Indicating
The system components and parts that sense, transmit, and indicate relative position of movable stabilizers for purpose of pitch trim. Typical parts are indicators, transmitters, etc.

2742 Stabilizer Actuator
The component which actuates the horizontal stabilizer to infinite angles of incidence to provide pitch trim. Includes both manual and power assist types. Typical parts are actuator, actuator bracket, clutch, motor, seal, etc.

2750 Trailing Edge Flap Control System
The system components and parts, except the actuator and position indicator which controls position and movement of wing trailing edge flaps. Does not include the structure, carriage, fittings, tracks and rollers which are filed in JASC code 5753; or the motor or actuator which causes movement of the flaps and are filed in JASC code 2752. Typical parts are control valve, switch, flow limiter, cable, torque tube, transmission, jackscrew, bypass valve, limit switch, return spring, buss cable, etc.

2751 Trailing Flap Position Indicating System
The system components and parts that sense, transmit and indicate trailing edge flap position relative to the wing surface. Typical parts are indicator, transmitter, position module, asymmetry switch, and comparator, etc.

2752 Trailing Edge Flap Actuator
The component which actuates the trailing edge flaps. Typical parts are motor, actuator, seal, jackscrew, rod end, actuator support fittings, etc.

2760 Drag Control System
The system components and parts other than actuator which controls position, movement, and indicate relative position of drag device and variable aerodynamic surfaces on the wing includes speed brake systems. Does not include structure and hinges filed in JASC code 5755. Typical parts are valve, hose, push rod, line, cable, indicator.

2761 Drag Control Actuator
The components that actuates spoiler and speed brake surfaces on the wing for speed and lift reducing purposes. Typical parts are seal, rod end bearing, rod end, etc.

2770 Gust Lock Damper System
The system and components protecting flight control surfaces from movement and damage by wind gusts while the aircraft is on the ground. Includes cockpit controlled surface locks common in light aircraft and independent hydraulic gust damper units mounted at each flight control surface on large jet powered aircraft. Does not include the dampening feature of the flight control power boost systems, which are filed with the specific control system (i.e., rudder damper). Typical parts are damper, cylinder, seal, rod end, lock pin cable, etc.

2780 Leading Edge Flap Control System
The system components and parts, except the actuator and position indicating system which controls the position and movement of the wing leading edge devices used for lift augmenting. Does not include the structure, hinges, and parts which do not cause movement of the surface filed in JASC code 5754. Typical parts are leading edge flaps, variable opening wing slots, priority valve, switch, cable, pulley, actuator bracket, torque shaft, regulator, etc.

2781 Leading Edge Flap Position Indicating System
The transmitter, indicator, warning lamps, and associated circuitry providing relative position information of wing leading edge devices to the flight crew.

2782 Leading Edge Flap Actuator
The component causing movement of the wing leading edge device control surfaces. Does not include related system or position indicating. Typical parts are actuator, actuator bracket, seal, etc.


2800 Aircraft Fuel System
The units and components storing and delivering fuel to the engine. Includes the integral tank leak detection and sealing. Does not include the structure of integral, tip fuel tanks, fuel cell backing boards covered in the structures JASC Chapters 53 and 57, or the fuel flow rate sensing, transmitting, or indicating systems which are covered in JASC Chapter 73. Use this code for fuel system reports with insufficient information to file in a more specific JASC 2800 series code. This code is also used to report problems involving two or more aircraft fuel system JASC codes.

2810 Fuel Storage
The portion of the fuel system used for the storage of fuel. Does not include defects in the wing primary structure of integral tanks. Typical parts are removable metal tank, tip tank, header tank, bladder fuel cell, tank interconnect lines, vent line, vent valve, drain valve, filler cap, filler neck, check valve, vent tube, cap seal, filler adapter, outlet fitting, screen, fueling panel, tank strap, sealant, etc.

2820 Aircraft Fuel Distribution System
The portion of the aircraft fuel system other than selector valves, transfer valves, electric motor driven pumps used to distribute fuel from the tank outlet to the powerplant quick disconnect or up to the strainer unit. Includes the engine primer equipment, the switch that senses failure of a system pump, and the switch that automatically activates the boost pump. Typical parts are line, fitting, primer, nozzle, primer pump, actuating linkage for the fuel selector/shutoff valve, etc.

2821 Aircraft Fuel Filter/Strainer
The component that filters unmetered fuel upstream of the engine fuel control/carburetor. Does not include the engine fuel metered control system filters (filed in JASC code 7300). Typical parts are screen, housing, bowl, gasket, plunger, stand pipe, etc.

2822 Fuel Boost Pump
The electric motor/engine driven pumps providing fuel under pressure to the engine fuel control/carburetor for starting and emergency use. Includes parts of the pump, associated motor, and electrical circuitry/switch. Does not include pressure switch indicating system. Typical parts are housing, seal, motor, brush, bearing, connector, and fuel transfer pump, etc.

2823 Fuel Selector/Shut-Off Valve
The component and associated controls and position indication units which provides for specific tank selection or shutting off flow to the engine. Typical parts are housing, rotor, handle, guard, seat, seal, selector valve, shutoff valve, spring, etc.

2824 Fuel Transfer Valve
The component and associated control linkage which provides for the transfer of fuel between tanks for crossfeeding to alternate engine fuel systems. Typical parts are, seal, housing, rotor, handle, transfer valve, etc.

2830 Fuel Dump System
The system and components which provide for the jettison of fuel overboard during flight. Typical parts are valve, switch, dump chute, etc.

2840 Aircraft Fuel Indicating
For general reports pertaining to the fuel indicating systems, but with no specific reference to the transmitter (tank unit) or indicator. Does not include engine fuel pressure reports which are filed in JASC code 7332, or flow indication system in JASC code 7331. Typical parts are circuit breaker, connector, pressure switch, indicator lights, dripstick, etc.

2841 Fuel Quantity Indicator
The indicator and low level warning system used to indicate the quantity of fuel in the tanks. Typical parts are indicator, lamp, bulb, etc.

2842 Fuel Quantity Sensor
The tank unit which measures and transmits a quantity level signal to the cockpit indicator. Typical parts are transmitter, float switch, probe, sensor, totalizer, tank unit float, gasket, etc.

2843 Fuel Temperature Indicating
The tank unit which measures the temperature of fuel in the tanks.

2844 Fuel Pressure Indicator
The tank unit which measures the pressure of fuel in the tanks. Typical parts are the pressure switch and indicator lights, etc.


2900 Hydraulic Power System
The units and components which furnish hydraulic fluid under pressure to a common point (manifold) for re distribution to other defined systems. For miscellaneous system parts other than components listed under other specific JASC Chapter 29 codes. Also, for reports of units or parts common to two or more components.

2910 Hydraulic, Main System
The portion of the main system which is used to store and deliver hydraulic fluid to the using system. Includes all hydraulic systems other than those designated emergency or standby. Does not include the supply valves to the using systems. Typical parts are tanks, accumulators, valves, pumps, levers, cables, line, hose, relief, shutoff vales, check valves, wiring, switches, external connectors, etc.

2911 Hydraulic Power Accumulator, Main
The component which provides for pressure surges to maintain a constant pressure in the system. Typical parts are accumulator, seal, end cap, air valve, etc.

2912 Hydraulic Filter Main System
The component which filters sediment from the hydraulic fluid in the main system. Typical parts are seal, gasket, housing, element, packing, etc.

2913 Hydraulic Pump Electric/Engine, Main
The component which provides hydraulic fluid pressure to using systems, but does not include the using systems. Includes power packs incorporating integral pumps, electric motors, and solenoids used in certain light aircraft models. Also includes pumps such as those used in flight control systems on large aircraft. Typical parts are pump, motor, shaft, brush, solenoid, case, power pack, seal, switch, etc.

2914 Hydraulic Handpump, Main
The manually actuated pump for emergency system pressure. Typical parts are handle, lever, seal, etc.

2915 Hydraulic Pressure Relief Valve, Main
The unit which relieves system relief pressure at a preset pressure. Typical parts are seal, spring, housing, relief valve, etc.

2916 Hydraulic Reservoir, Main
The component which stores hydraulic fluid. Typical parts are reservoir, filler cap, filler neck, sight gauge, seal, etc.

2917 Hydraulic Pressure Regulator, Main
The unit which maintains a preset operating system pressure to the using systems. Typical parts are regulator, seal, case, etc.

2920 Hydraulic, Auxiliary System
The portion of the main system which is classified as auxiliary, emergency, or standby, and which is used to supplement or take the place of the main hydraulic fluid to the using system. Does not include the supply valves to the using systems. Typical parts are tank, accumulator, valve, pump, lever, cables, switch, plumbing, wiring, external connectors, and miscellaneous auxiliary system parts other than those listed in JASC codes 2921 through 2934.

2921 Hydraulic Accumulator, Auxiliary
The component which provides for pressure surge to maintain a constant pressure in the auxiliary system. Typical parts are accumulator, seal, end cap and air valve, etc.

2922 Hydraulic Filter, Auxiliary
The component which filters sediment from the hydraulic fluid in the auxiliary system. Typical parts are seal, gasket, housing, element, and packing, etc.

2923 Hydraulic Pump, Auxiliary
The component which provides hydraulic fluid pressure to the using auxiliary system. Typical parts are pump, motor, shaft, brushes, case, seal, switches, etc.

2925 Hydraulic Pressure Relief, Auxiliary
The unit which relieves auxiliary system pressure. Typical parts are seal, spring, housing, relief valve, etc.

2926 Hydraulic Reservoir, Auxiliary
The unit which stores auxiliary hydraulic fluid. Typical parts are reservoir, filler cap, filler neck, sight gauge, etc.

2927 Hydraulic Pressure Regulator, Auxiliary
The unit which maintains a preset operating system pressure to the using auxiliary hydraulic system. Typical parts are regulator, seal, case, etc.

2930 Hydraulic System, Indicating
For reports of hydraulic pressure and quantity indicating system parts other than the indicator or sensor or for parts common to both pressure and quantity systems.

2931 Hydraulic Pressure Indicator
The instrument and associated low pressure warning system which registers system pressure. Typical parts are indicator, warn lamp, bulb, etc.

2932 Hydraulic Pressure Sensor
The components which sense system pressure and transmit a signal to the cockpit indicator or low pressure warning lamp. Typical parts are transmitter, pressure switch, sensor, etc.

2933 Hydraulic Quantity Indicator
The instrument and associated low level warning system which registers reservoir fluid quantity. Typical parts are indicator, lamp, bulb, sight gage, etc.

2934 Hydraulic Quantity Sensor
The components which sense the fluid level and low level warning and transmit a signal to the quantity indicator. Typical parts are transmitter, sensor, float switch, etc.


3000 Ice/Rain Protection System
The units and components which provide a means of preventing or disposing of formation of ice and rain on various parts of the aircraft. Includes miscellaneous items with insufficient information to file in a specific JASC 3000 series code. Does not include the basic windshield panel.

3010 Airfoil Anti/De-ice System
The system components and parts including the boots which provide for wing and empennage leading edge ice prevention or removal. Does not include ducts upstream of the airfoil control/selector valves. Typical parts are timer, valve, switch, hose, flow valve, duct, duct coupling, thermostat, etc.

3020 Air Intake Anti/De-Ice System
The system and components which eliminate or prevent the formation of ice in or around air intakes such as turbine engine cowling. Does not include engine anti icing reports filed in JASC code 7510. Includes the electrically heated boot at the air intake lips.

3030 Pitot/Static Anti-Ice System
The heating elements in the pitot-static pick up heads to eliminate or prevent the formation of ice. Does not include defects with the pitot or static systems. Typical parts are element, switch, wiring, etc.

3040 Windshield/Door Rain/Ice Removal
The system and components which is used to clear, eliminate or prevent the formation of rain, ice or frost on the windshield or windows. Excludes reports of glass panel cracking filed in JASC code 5610. Typical parts are motor, actuator, wiper blade, hydraulic converter, shaft, line, switch, the electrical heating portion of heated glass panels, control units, alcohol deice system lines, tanks, pumps, valves, etc.

3050 Antenna/Radome Anti-Ice/De-Ice System
The system which is used to eliminate or prevent the formation of ice on antennas and radomes.

3060 Propeller/Rotor Anti-Ice/De-Ice System
The system components and parts which are used to eliminate or prevent the formation of ice on propellers and rotors. Includes electrically heated systems, and alcohol spray systems. Does not include the system parts on the rotating portion of the propeller which are filed in JASC code 6112 or the heating mats on the rotating portion of the rotor in JASC code 6210 or code 6410. Typical parts are brush block, timer, switch, relay, harness, terminal block, etc.

3070 Water Line Anti-Ice System
The system which is used for prevention of ice in water supply and drain lines.

3080 Ice Detection
The system which is used to detect and indicate the formation of ice. Typical parts are panel, detector, etc.


3100 Indicating/Recording System
The pictorial coverage of all instrument panels and controls. Procedural coverage of those systems which give visual or aural warning of conditions in systems which record, store, or compute data from unrelated systems. Includes the system or units which integrate indicating instruments into a central display system not related to any specific system.

3110 Instrument Panel
The removable cockpit instrument and control panels. Includes the mounting hardware and shock absorbing devices.

3120 Independent Instruments
The units which measures time, logs elapsed time of operation, or measures acceleration/deceleration forces. Typical parts are hour meter, pressure switch, line, etc.

3130 Data Recorders (Flight/Maintenance)
The unit which continuously records critical flight, aircraft and powerplant system data, such as attitude, air speed, altitude, engine power, etc., to be used in the event of a crash. Includes the system and parts which provide a source of power and inputs, from various sources critical to flight, to flight data recorder. Typical parts are spool rod, magazine, etc.

3140 Central Computers
The systems and components used for computing data from a number of different sources without a preponderance of functions in any one system, for call up on a display. Includes integrated instrument systems such as engine, airplane power and central warning indicators when combined into a central display. Typical parts are "digital core avionic system" (DCAS), "engine indications and crew alerting system" (EICAS), stored checklist, emergency procedures, company regulations, etc.

3150 Central Warning
The panels and associated circuitry which warn of potential problems in two or more independent or related systems. Warnings can be either audible or visual. Typical parts are annunciator panel, relay, lamp, PC board, diode, throttle microswitch, etc.

3160 Central Display
The systems and components which give visual display of conditions in unrelated systems.

3170 Automatic Data
The systems and components used for collating and computing data from unrelated systems and transmitting the same automatically. Includes "aircraft to satellite data relay" (ASDAR) system and components.


3200 Landing Gear System
The units and components which furnish a means of supporting and steering the aircraft on the ground or water, and make it possible to retract and store the landing gear in flight. Includes the functioning and maintenance aspects of the landing gear doors, but does not include the door structure which is covered in JASC Chapter 52. Use this code for general landing gear reports with insufficient information for filing in a more specific JASC 3200 series code.

3201 Landing Gear/Wheel Fairing
The wheel fairings and attaching parts. Typical parts are bracket, fender, fairing, etc. The fairing location such as "nose wheel" should be shown in the "Part Location" field.

3210 Main Landing Gear
The miscellaneous parts of the main landing gear system which cannot be directly associated with a specific main gear code, such as attachment, emergency flotation or strut, axle, truck, etc. This code is not to be used for the retraction/extension system or the doors. Landing gear location, left or right should be referenced in the "Part Location" field.

3211 Main Landing Gear Attach Section
The parts and assemblies which attach the main landing gear to the airframe structure. An entry in the "Part Location" field should include a reference to "left or right" gear. Typical parts are fitting, bolt, U-bolt, casting, supports, attaching hardware, etc.

3212 Emergency Flotation Section
The helicopter inflatable floats and attaching parts which permit emergency landings on water. The float make and model, as well as the aircraft make and model should be included in the report. Typical parts are float valve, hose, bracket, cylinder, etc.

3213 Main Landing Gear Strut/Axle/Truck
The main landing gear components and parts such as struts, axles, trucks which support the aircraft on the ground or water. Typical parts are shock device, torque link, beam and skid/shock device on rotorcraft.

3220 Nose/Tail Landing Gear
The miscellaneous parts of the nose or tail gear system which cannot be directly associated with a specific nose/tail gear code such as attachment, struts, axles, etc. This code is not to be used for extension/retraction mechanism, steering/dampening system, or doors.

3221 Nose/Tail Landing Gear Attach Section
The parts and assemblies which attach the nose/tail gear to the airframe structure. Applicable to fixed or retractable type landing gear.

3222 Nose/Tail Landing Gear Strut/Axle
The nose gear component parts such as shock struts and axles which support the aircraft on the ground. Torque links are included but steering/shimmy dampening systems and units are excluded.

3230 Landing Gear Retract/Extension System
The miscellaneous parts of the retraction system other than actuators, and door actuating mechanism. Location, such as nose, right or left main should be referenced in the "Part Location" field unless the defective part is common to all locations. Typical parts are leveling cylinders, centering system, actuator brackets, bungees, emergency extension system parts, uplocks/downlocks, uplock/downlock actuator, drag braces, etc.

3231 Landing Gear Door Retract Section
The nose and main landing gear door actuating system parts other than the actuator. Excludes door structure and hinges which are to be filed in JASC code 5280. Typical parts are bellcrank, rod, sequence valve, latch, lines, hoses, etc.

3232 Landing Gear Door Actuator
The actuating units which open and close the landing gear doors. Position on the aircraft (nose, left, or right main) should be shown in the "Part Location" field.

3233 Landing Gear Actuator
The actuating units which retract and extend the nose or main gear. This includes electric motors, hydraulic cylinders but not self contained electric motor driven hydraulic pumps such as power packs which are filed in JASC code 2913. Specify main gear or nose gear on Location data field. Typical parts are actuator, seal, piston, cylinder, centering system, bungee spring, circuit breaker, etc.

3234 Landing Gear Selector
The selector valves, switches, or control levers used to direct a power source to actuators for gear retraction and extension.

3240 Landing Gear Brake System
The brake system miscellaneous parts other than the brake assembly, master cylinder, power valve and anti-skid system. Includes the pressure source and associated system for emergency brake actuation, and brake anti-ice system. Typical parts are line, hose, fitting, park brake valve, gauge, etc.

3241 Brake Anti-Skid Section
The system units and parts which automatically control brake pressure during landing roll to prevent tire skidding. Typical parts are transducer, control box, valve, etc.

3242 Brake
The parts of the brake unit mounted at the wheels only. The position on the aircraft should be shown in the "Part Location" field. Typical parts are disc, cylinder, lining, seal, rotor, housing, etc.

3243 Master Cylinder/Brake Valve
The units which provide a power source for cylinder-power brake actuation. Does not include connecting lines to brake units which are filed in JASC code 3240. Typical parts are seal, piston, housing, etc.

3244 Tire
For reports of tire defects and failures. Include the manufacturer size and defect location in text. Identify the location of the tire in the "Part Location" field (i.e., nose, right main landing gear, "NLG", or "RT MLG").

3245 Tire Tube
For reports of defective wheel tire tubes. Include the manufacturer name, tube type and size.

3246 Wheel/Ski/Float
For reports of defective wheels, skis or seaplane floats and associated parts such as bearings, dust seals, bolts. The "Part Name" field should not refer to a part of the wheel which is defective such as "rim" or "half" that does not have separate part numbers. Such entries should be placed in the text. Identify the location of the wheel in the "Part Location" field (i.e., nose, right main landing gear, "NLG,"or "RT MLG"). The wheel, ski or float make, model, and part number should also be included in the report.

3250 Landing Gear Steering System
The miscellaneous system parts other than the actuator which provide for aircraft directional control on the ground. Includes main gear steering systems. Does not include wheel braking systems. Typical parts are, cable, rod end, collar, line, valve, accumulator, etc.

3251 Steering Unit
The actuator which turn the wheel(s) by a power source for controlling direction of movement on the ground. Typical parts are cylinder, seal, etc.

3252 Shimmy Damper
The devices mounted on steerable wheel forks to reduce shimmy. Typical parts are seal, spring, housing, etc.

3260 Landing Gear Position and Warning
The system parts which provides indication and warning of the landing gear position. Includes gear safety switches which prevent inadvertent actuation such as squat or air/ground sensor. Typical parts are relay, switch bracket, lamp, horn, uplock switch, downlock switch, in transit switch, etc.

3270 Auxiliary Gear (Tail Skid)
The devices such as tail skids on tricycle gear aircraft used to stabilize the aircraft on the ground and to prevent ground contact damage. This code is also used for supplementary wheels on rotorcraft, skids for ground handling but not for skids or amphibian/seaplane floats, hull or associated retractable landing gear. This code is not for auxiliary or emergency landing gear extension systems which are filed in JASC code 3230.


3300 Lighting System
The units and components which provide for external and internal illumination. Includes light fixtures, switches and wiring. Does not include warning lights for individual systems. Use this code for reports of a general nature or for miscellaneous external and internal lamps, circuitry, switches, etc., with insufficient information to file in a specific JASC 3300 series code. Warning lights are filed in the individual JASC Chapter 33 code.

3310 Flight Compartment Lighting
The lighting systems and equipment including panel illumination other than inside individual instruments, master warning light systems such as annunciator panels, and associated dimming systems located in the flight compartment only. Typical parts are bulb, socket, switch, lamp, lens, relay, rheostat, resistor, ballast, etc.

3320 Passenger Compartment Lighting
The lighting systems in the passenger seating compartment, lavatories, buffet/galley compartments and cabin carry-on baggage/coat areas. Includes lamps for illumination of cabin, reading lamps, seat belt/no-smoking signs and passenger call systems. Does not include emergency lighting which is to be filed in JASC code 3350. Typical parts are ballast, switch, transformer, lamp, etc.

3330 Cargo Compartment Lighting
The lighting systems in the compartments used for storage of cargo, baggage, or aircraft system components which require servicing. Does not include electrical systems fire or smoke sensing. Typical parts are circuit breaker, lamp, lens, switch, etc.

3340 Exterior Lighting
The lighting systems for illumination outside the aircraft such as landing, taxi, position, wing illumination including the rotating beacon and strobe. Typical parts are switch, lamp, power supply, lens, circuit breaker, flasher unit, relay, motor, wheel well lights, brackets, etc.

3350 Emergency Lighting
The cabin, flight compartment, and exterior emergency lighting systems, which furnish illumination in event of electrical power failure. This includes batteries, lamps, and associated circuitry and parts for emergency exit lighting.


3400 Navigation System
The units and components which provide aircraft navigational information. For reports which are of a general nature relating to the navigation systems. Use this code for reports with insufficient information to file in a more specific JASC 3400 series code.

3410 Flight Environment Data
The system which senses environmental conditions and uses the data to influence navigation.

3411 Pitot/Static System
The system which provides a source of ram or static air for distribution to using instruments and pressure differential units such as automatic landing gear extender, altimeter, airspeed and rate of climb. Does not include the using units, instruments, the anti-ice heating elements, or the associated circuitry and switches which are filed in JASC code 3030. Typical parts are air pick up heads, lines, fittings, drain valves, static port, selector valve, etc.

3412 Outside Air Temperature Indicator/Sensor
The unit mounted in the engine induction air intake to sense and transmit temperature to the cockpit indicator. Also for the sensors and instruments which measure and indicate the temperature of ambient air outside the aircraft. Includes associated circuitry and related parts. Typical parts are sensor, indicator, case, etc.

3413 Rate of Climb Indicator
The instrument which senses and indicates the rate of climb or descent of an aircraft. Does not include the associated static system. Includes the instantaneous vertical speed indicator (IVSI).

3414 Airspeed/Mach Indicating
The instrument which measures and indicates speed of the aircraft. Does not include the doppler indicator which are filed in JASC code 3443.

3416 Altimeter, Barometric/Encoder
Altimeters and barometric encoders used to measure and indicate altitude. Also includes the unit which senses and alerts to a change in a preselected altitude. Does not include the Ground Proximity Systems which are filed in JASC code 3444. Typical parts are dial, case, pointer, spring, etc.

3417 Air Data Computer
The computer and its integral parts which receives data from various environmental sensing systems, computes this data, and makes it available to the various navigation systems. Does not include external hardware such as cables, mounting racks, remote switches, etc., which are filed in JASC code 3410.

3418 Stall Warning System
The system components and parts, including the computer which sense, transmit and provide aural, visual and stick shaker warning of an aircraft in an impending flight stall condition. Typical parts are transducer, stall warning detector, switch, vane, horn, lamp, stick shaker, heater element, warning unit computer, module, etc.

3420 Attitude and Direction Data System
The system components and parts which use magnetic, gyroscopic, and inertia forces to indicate an aircraft attitude and direction. Use this code for reports with insufficient information to file in JASC codes 3421 through 3425. Includes such items as the inertial reference system (IRS), etc.

3421 Attitude Gyro & Indicating System
The gyroscopic unit which supplies attitude information to the necessary systems; for instance, vertical reference outputs for use as roll and pitch data to the autopilot computer. Includes the instruments operating by the gyroscopic principle, driven by air flow or an electric motor. Typical parts are vertical gyro and the gyro horizon.

3422 Directional Gyro & Indicating System
The unit operating by gyroscopic principle and driven by airflow or an electric motor, which provides heading (direction) references relative to a preset heading in degrees of the compass. Also for the flux unit detector which senses the earth's magnetic field and uses this data to correct for gyro drift. Typical parts are gyro, rotor, bearing, etc.

3423 Magnetic Compass
The instrument which indicates the magnetic heading of an aircraft by self contained magnetized needles. Typical parts are compensator, adjusting screw, gasket, float, case, etc.

3424 Turn & Bank/Rate of Turn Indicator
The instrument actuated by gyroscopic forces and driven by air flow or electric motor to indicate both rate of turn and angle of bank.

3425 Integrated Flight System
The system which computes, interrogates, and continuously displays basic attitude, position, and steering information in order to maintain a particular course, heading, or attitude. Does not include flight management system components, which should be assigned to JASC code 3460. Typical parts are integrated flight annunciator, integrated flight comparator, integrated flight computer/amplifier, integrated flight control and integrated flight indicators (i.e., horizontal situation indicator (HSI), attitude and direction indicator (ADI), attitude direction unit (ADU), heading and direction indicator (HDI), radio direction indicator (RDI), course direction indicator (CDI), flight director indicator (FDI), pictorial navigation indicator, flight command indicator, steering computer utilized in the integrated flight instrument systems, and other components such as cables, connectors, etc.

3430 Landing and Taxi Aids
The system providing guidance during approach, landing and taxiing. Includes such items as, ILS, paravisual director, ground guidance systems, markers, etc.

3431 Localizer/VOR System
The electronic portion of an instrument landing system (ILS) that indicates the centerline of the runway to the pilot. For reports on localizer/very high frequency omni range (VOR) systems. Typical parts are receiver, antenna, indicator, circuit breaker, switch, antenna coax, etc.

3432 Glide Slope System
The system which provides an instrument needle reference from an electronic signal radiated from a ground transmitter to enable the pilot to fly the proper glide path for landing under instrument meteorological conditions. Typical parts are circuit breaker, switch, receiver, antenna, indicator, etc.

3433 Microwave Landing System
The instrumental landing system operating in the microwave spectrum which provides lateral and vertical guidance to aircraft having compatible avionics equipment. Typical parts are receiver, antenna, control panel, etc.

3434 Marker Beacon System
The system which provides an aural and visual indication of passage over specified points on the glide path for landing under instrument meteorological conditions.

NOTE: In instances where the control panel is an integral portion of the audio control panel, it would be filed in JASC code 2350. Typical parts are marker beacon antenna, receivers, visual/aural indication units, marker light, control panel, etc.

3435 Heads Up Display System
The flight instrument system that allows the pilot of an aircraft to watch the flight instruments while looking ahead of the aircraft. Includes the display screen which allows information to be visually presented to the pilot while looking through the windscreen or at the control panel.

3436 Wind Shear Detection System
The flight instrument system that allows the pilot to detect strong horizontal or vertical wind shift that acts at right angles to the direction the wind is blowing. Includes the outboard sensors, indicators, and the warning system which notifies the pilot of the appropriate corrective action maneuver to take.

3440 Independent Position Determining System
The system which provides information to determine position and is primarily independent of ground installations. Use this code for reports of a general nature or for reports containing insufficient information to file in a more specific code identified in JASC codes 3441 through 3446. Typical parts are star tracker, sextants/octants, etc.

3441 Inertial Guidance System
The navigation system which relies upon gyro platforms and accelerometers for its operation. Includes the control panel for the inertial navigation system; the instruments which receives their signal from the Inertial Navigation Unit (INU); and the unit containing the inertial platform and digital computer portion of the system. Use this JASC code for hardware components which do not have specific JASC codes assigned to them or when a system malfunction or failure occurs but the exact cause is not known. Typical parts are mode selector unit (MSU), control display unit (CDU), remote display unit (RDU), etc.

3442 Weather Radar System
The system components and parts which transmits and receives a signal independent of ground facilities to determine the relative position of adverse weather cells. Typical parts are transceiver, antenna, control panel for the weather avoidance radar system, accessory synchronizers, servo amplifier, scope, etc.

3443 Doppler System
The airborne radar system which utilizes the doppler effect to measure and display ground speed, drift angle, cross track, etc.

3444 Ground Proximity System
The system which detects and alerts flight crew to potential terrain hazards. Includes the antenna which transmits and receives an electronic signal for the radio altimeter equipment used for terrain-to-aircraft distance. Also includes the component which interprets a radio signal reflected back to a receiver to determine distance from the nearest terrain; and the component which process the warning computer input signals from various sources in order to determine if and when the crew should be alerted of a terrain hazard.

3445 Air Collision Avoidance System
The system which provides information to determine aircraft position and is primarily independent of ground installations (i.e., traffic alert and collision avoidance system TCAS). Use this code only if the specific system creating the problem cannot be established. Typical parts are collision avoidance monitoring units, etc.

3446 Non Radar Weather System
The non radar weather system and components which sense the electrostatic charges accumulated around a storm cell in order to "map out" that cell on an indicator.

3450 Dependent Position Determining System
The system which provides information to determine position and is mainly dependent on ground installations. Use this code for reports of a general nature or for those with insufficient information to file in a more specific JASC code identified in JASC codes 3451 through 3457.

3451 DME/TACAN System
The systems which measures time station, ground speed, and distance to a known transmitter location by transmitting and receiving electronic pulse signals (i.e., distance measuring equipment DME; ultra high frequency tactical air navigational aid TACAN). Typical parts are antenna, control unit, transceiver, coaxial cables, etc.

3452 ATC Transponder System
The air traffic control (ATC) system which receives coded signals from a ground station and transmits a coded reply for altitude reporting and identification purposes. Typical parts are transponder, antenna, control unit, transceiver, coaxial connecting cables, etc.

3453 Long-Range Navigation (LORAN) System
The radio navigation system and associated components and parts which provides for long range navigation (LORAN) enroute when operating on signals from ground based master and slave transmitting stations. Typical parts are antenna, coupler, CPU, receiver, indicator, etc.

3454 Visual Omnirange (VOR) System
The radio navigation system in the very high frequency (VHF) band used for determining position relative to a ground transmitter and permits selection of an infinite number of magnetic courses for navigation to a transmitter (i.e., visual omnirange VOR system). Typical parts are receiver, antenna, control panel, etc.

3455 Automatic Direction Finder (ADF) System
The low frequency band system which receives a signal from a non directional radio beacon to determine relative position from the beacon location (i.e., automatic direction finder - ADF system). Typical parts are antenna, control unit, receiver, coaxial cables, etc.

3456 Omega Navigation System
The low frequency navigation system which provides for system geographical location of the aircraft on a worldwide basis when operating on signals from ground-based OMEGA and VHF transmitting stations. Typical parts are antenna, control unit or receiver, coaxial connecting cable, remote switches, connectors, etc.

3457 Global Positioning System
The systems which are mainly dependent upon signals from ground transmitters or orbital satellites for their operations; systems such as VOR, ADF, DME, etc. Use this JASC code when there is insufficient information to assign one of these specific using system codes. Typical parts are antenna, control unit or receiver, coaxial connecting cable, remote switches, connectors, etc.

3460 Flight Management Computing System
The system which combines navigational data to compute or manage the aircraft's geographical position or theoretical flight path. Typical parts are course computers, flight management computers, performance data computers, and associated control display units, warning annunciators, etc.


3500 Oxygen System
The units and components which store, regulate, and deliver breathing oxygen to the passengers and crew. Typical parts are bottles, relief valves, shut off valves, outlets, regulators, masks, walk around bottles, etc.

3510 Crew Oxygen System
The portion of the main system which furnishes oxygen to the crew.

3520 Passenger Oxygen System
The portion of the main system which furnishes oxygen to the passengers.

3530 Portable Oxygen System
The equipment attached to the portable bottle to regulate and dispense breathing oxygen, including the storage bottle for the portable oxygen system.


3600 Pneumatic System
The units and components which deliver large volumes of compressed air from a power source to connecting points for other systems such as air conditioning, pressurization, deicing, etc.

3610 Pneumatic Distribution System
Components and parts other than the regulator and shutoff valves delivering large volumes of compressed air from a power source to the control valves of using systems such as conditioning, pressurization. Doesn't include engine and airfoil anti-icing/deicing systems. Typical parts are regulator valve, actuator, duct, ducts valves, manifold, clamp, flow venturi, bellows, wye duct, check valve.

3620 Pneumatic Indicating System
The system components and parts which sense, transmit, and indicate the temperature and pressure of air in the distribution system other than the pressure indicator or sensor. Includes the instrument which indicates air pressure in the pneumatic distributing systems. Does not include the using systems.


3700 Vacuum System
The units and components used to generate, deliver, and regulate negative air pressure. Use this code for general reports of the pressure/vacuum system with insufficient information to file in a more specific JASC 3700 series code.

3710 Vacuum Distribution System
The system components and parts, other than the pump, regulator, oil separator or indication system, which are used to distribute low volume, negative pressure air (suction) to systems such as gyroscopic flight instruments, cabin rate controller, etc.; and to distribute low volume, positive pressure air to systems such as air foil deicer boots. Does not include the using systems. Typical parts are pump, filter, regulator, lines, manifold, check valves, element, etc.

3720 Vacuum Indicating System
The system components and parts including which indicates negative air pressure in the vacuum lines. Includes the indicator and warning systems. Typical parts are the vacuum indicator and associated lines.


3800 Water & Waste System
The fixed units and components which store and deliver fresh water. Also includes those fixed components which store and furnish a means of removal of water and waste. Use this code for reports with insufficient information to file in a more specific JASC 3800 series code. This code is also used for reports common to two or more systems.

3810 Potable Water System
The system which is used to store and deliver fresh drinking water.

3820 Wash Water System
The system which is used to store and deliver wash water.

3830 Waste Disposal System
The system and components used for the disposal of water and waste. Includes wash basins, water closets, flush systems and collection tanks. Typical parts are valve, flush motor, lines, timer, etc.

3840 Air Supply (Water Pressure System)
The system which provides the pressure to distribute potable water to the lavatories, etc. Typical parts are pump, motor, lines, etc.


4500 Central Maintenance Computer
The unit, components and associated systems which interface with other airplane systems and provides a convenient way of communicating system problems to aircraft maintenance personnel. The system contains checkout and fault isolation procedures using a central computer to locate a single system or component malfunction. Typical parts are computer, storage devices, controls, display, etc.

4900 Airborne Auxiliary Power Unit (APU) System
The airborne auxiliary power units (APU) installed on aircraft for the purpose of generating and supplying a single type or combination of auxiliary electric, hydraulic, pneumatic or other power. Does not include generators, alternators, hydraulic pumps, etc., or their connecting systems which supply and deliver power to their respective aircraft systems. Use this code for reports of a general nature with insufficient information to file in a specific JASC 4900 series code, or for reports which involve two or more APU systems. An entry "APU" is acceptable if no specific part is reported. The APU as well as aircraft make and model should be reported if known.

4910 APU Cowling/Containment
The system of cowling and other components used to cover the auxiliary power unit, and contain any broken parts in the event of an external failure.

4920 APU Core Engine
For reports of basic engine defects such as compressor, turbine, cases other than specific systems shown in other APU sub systems such as fuel, ignition, exhaust, starting and controls. The APU make and model should be included if available. Typical parts are turbine, bearing, seal, impeller, blade, case, burner can, etc.

4930 APU Engine Fuel & Control
The system and components which furnishes fuel from the aircraft tanks to the APU fuel control and associated injector nozzles. Including the unit which provides fuel at the proper pressure for fuel control operation; and the unit controlling and injecting metered fuel to the engine burner can section. Typical parts are shutoff valve, line, fitting, etc.

4940 APU Start Ignition System
The system units used to start the APU engine. Including the unit which provides a power source to the igniter during the starting cycle. Typical parts are ignition unit, magneto, igniter, starter, etc.

4950 APU Bleed Air System
The system and components which provide and control a source of pressure and high volume of air for aircraft using systems such as engine starting, cabin air conditioning prior to starting engines. Typical parts are duct, bleed valve, clamp, seal, etc.

4960 APU Controls
The system components which electrically and manually control operation of the APU engine. Typical parts are relay, control box, etc.

4970 APU Indicating System
For general reports of APU operation indicating including the temperature indicator, tachometer generator or indicator (engine speed). Includes the instrument and associated warning system which sense, transmits, and indicates APU engine speed and temperatures to the flight crew.

4980 APU Exhaust System
The components and parts which collect and direct exhaust gasses from the APU turbine to the aircraft exterior. Includes the movable door fairing. Typical parts are nozzle, door, actuator, seal, clamp, and shield.

4990 APU Oil System
The system and components used for APU engine lubrication. Typical parts are filter, pump, relief valve, hose, line, etc.


5100 Standard Practices/Structures
The standard practices and general procedures for typical repairs applicable to more than one chapter that are not specifically covered under JASC Chapters 52 through 57.

5101 Aircraft Structures
For reports of aircraft structural problems of a general nature which affects two or more areas. Includes reports of lightning strikes which cannot be associated with a specific JASC code.

5102 Balloon Reports
For all balloon reports irrespective of location or component involved. Includes all airship reports irrespective of location or component involved. Also includes reports for water ballast which are normally filed in JASC 4100 series codes. Typical parts are stitching, seam, fabric, burner, valve, handle, valve seat, manifold and burner fuel tank, etc.


5200 Doors
The removable units used for entrance or exit, and for enclosing other structure contained within the fuselage. Includes passenger and crew doors, cargo doors, emergency exits, etc. Electrical and hydraulic systems associated with door control are included as appropriate. Use this code for door reports of a general nature which affect two or more specific type of doors or are reported with insufficient information to file in a more specific JASC 5200 series code.

5210 Passenger/Crew Doors
For reports of cabin entrance doors. Does not include door frames, warning systems, or cabin emergency exit doors/hatches. Typical parts are hinges, actuators, latches, handle, seals, structure, spring, cable, bellcrank, skin, etc.

5220 Emergency Exit
For reports of emergency exit doors, windows and hatches. Typical parts are pan, hinge, latch, hook, etc.

5230 Cargo/Baggage Doors
For exterior doors used to gain access to cargo or baggage storage areas. Does not include door frames on fuselage, door warning or compartment interior furnishings. Typical parts are door structure, seal, hinge, latch, latch pin, handle, skin, etc.

5240 Service Doors
For reports pertaining to exterior doors used to gain access for servicing aircraft systems and equipment.

5241 Galley Doors
For reports pertaining to the galley door. Typical parts are hinges, structure, and the latch mechanism.

5242 Electrical/Electronic Compartment Doors
For reports pertaining to the electrical/electronic compartment doors. Typical parts are hinges, structure, and the latch mechanism.

5243 Hydraulic Compartment Doors
For reports pertaining to the hydraulic compartment doors. Typical parts are hinges, structure, and the latch mechanism.

5244 Accessory Compartment Doors
For reports pertaining to the accessory compartment doors. Typical parts are hinges, structure, and the latch mechanism.

5245 Air Conditioning Doors
For reports pertaining to doors used to gain access to the air conditioning compartment system and components. Typical parts are hinges, structure, and the latch mechanism.

5246 Fluid Service Doors
For reports of service doors used to gain access to fluid service areas, excluding compartment doors which are filed in JASC code 5243. Typical parts are hinges, structure, and the latch mechanism.

5247 Auxiliary Power Unit (APU) Doors
For reports of doors used to gain access for servicing the APU and components. Typical parts are hinges, structure, and the latch mechanism.

5248 Tail Cone Doors
For reports pertaining to the tail cone door. Typical parts are hinges, structure, and the latch mechanism.

5250 Fixed Inner Doors
For reports of doors within the fuselage in fixed partitions. Typical parts are structure, hinges, latches, lining but does not include doors in movable partitions.

5260 Entrance Stairs
For reports of cabin entrance stairs which operate in conjunction with but are not an integral part of entrance doors. Typical parts are structure, actuator, controls and handrails, step, cable, bungee, latch hook, latch, bracket, bellcrank, etc.

5270 Door Warning System
The system which is used to indicate to flight crews whether the exterior doors are closed and properly latched. Does not include the landing gear position warning indications which are covered in JASC code 3260. Typical parts are switch, lamp, horn, relay, etc. The suspect door should be identified if known.

5280 Landing Gear Doors
For reports pertaining to the structural aspects of landing gear doors including hinges and seals on the wing, landing gear, and fuselage mounted doors. The door position on the aircraft or landing gear (i.e., nose, right main outboard, etc.) should be shown in the part location field. Does not include the operating mechanism or position indicating or warning system which is filed in JASC codes 3231 or 3260.


5300 Fuselage Structure (General)
For reports of structural units and associated components and members which make up the compartments for crew, passengers, equipment, cargo, plus the structure of the envelope and gondola of airships.

5301 Aerial Tow Equipment
For reports of defective aerial tow equipment including the attachments on fuselage and release mechanism.

5302 Rotorcraft Tail Boom
For reports of the structure including exterior skin and truss framework of tail booms on rotorcraft. Includes attach fittings, etc., for tail boom and stabilizer surfaces. Typical parts are bulkhead, bracket, frame, frame tube, plate, etc.

5310 Fuselage Main, Structure
For general reports of fuselage structure defects which affect two or more related parts or are reported with insufficient information to file in a more specific JASC 5300 series code. Use of this code should be avoided if possible.

5311 Fuselage Main, Frame
For reports of the main fuselage frames. The associated attach fittings are covered in JASC code 5320.

5312 Fuselage Main, Bulkhead
For reports of the main fuselage bulkheads and the associated attach fittings.

5313 Fuselage Main, Longeron/Stringer
For reports of the main fuselage longerons/stringers and the associated attach fittings.

5314 Fuselage Main, Keel
For reports of the main fuselage keel beams and the associated attach fittings.

5315 Fuselage Main, Floor Beam
For reports of the main fuselage floor beams and the associated attach fittings.

5320 Fuselage, Miscellaneous Structure
For reports of miscellaneous structure of the main fuselage structure which aids in the support of the primary structure. Includes such items as brackets, channels, stiffeners, clip, etc. Does not include movable partitions which are covered in JASC Chapter 25.

5321 Fuselage, Floor Panel
For reports of the interior floor panels within the main fuselage structure.

5322 Fuselage Internal Mounting Structure
For reports of the internal mounting structure which aids in the support of the fuselage structure.

5323 Fuselage, Internal Stairs
For reports of the internal stairs which are part of the fuselage structure.

5324 Fuselage, Fixed Partitions
For reports of the fixed partitions which are part of the fuselage structure.

5330 Fuselage Main, Plate/Skin
For reports of the exterior covering of the fuselage including access covers and skin doublers.

5340 Fuselage Main, Attach Fittings
For reports of the fittings on the fuselage used for the attachment of doors, wings, stabilizers, landing gear, engine and rotor pylons, and the support of equipment within the fuselage. For reports of fuselage attach fittings that can not be specifically identified in JASC codes 5341 through 5347.

5341 Wing Attach Fitting (On Fuselage)
For reports of the fittings on the fuselage used for the attachment of the wings.

5342 Stabilizer Attach Fitting (On Fuselage)
For reports of the fittings on the fuselage used for the attachment of the stabilizers.

5343 Landing Gear Attach Fitting (On Fuselage)
For reports of the fittings on the fuselage used for the attachment of the landing gear.

5344 Door Hinge (On Fuselage)
For reports of the fittings on the fuselage used for the attachment of the doors.

5345 Equipment Attach Fitting (On Fuselage)
For reports of the fittings on the fuselage used for the attachment of equipment.

5346 Powerplant Attach Fitting (On Fuselage)
For reports of the fittings on the fuselage used for the attachment of the powerplant. (i.e., the center engine on tri-engine airplanes).

5347 Seat/Cargo Attach Fitting (On Fuselage)
For reports of the fittings on the fuselage used for the attachment of seats and cargo restraint mechanisms.

5350 Fuselage Aerodynamic Fairing
For reports of fixed and removable aerodynamic fairings between the fuselage and wing/empennage/nacelle attach points, tail cones and radomes. Also includes the rings on rotorcraft tail cones. Typical parts are tail, radome, fairing, stiffener, skin, screw, fillet, etc.


5400 Nacelle/Pylon Structure
For reports of structural units and associated components and members which furnish a means of mounting and housing the powerplant or rotor assembly. Includes the structure of powerplant cowling inclusive of the structural portion of the inlet whether or not integral with the aircraft. Structural portions of the exhaust system are excluded where they are not integral with the airframe. Use this code when there is insufficient information to file in a more specific JASC 5400 series code.
NOTE: The use of this code should be avoided if possible as a reported defect is not likely to involve both pylon and nacelle.

5410 Main Frame (Nacelle/Pylon)
For reports of the structure which houses and supports powerplants. Includes the firewall and all structure aft on multi-engine aircraft and firewalls on single engine aircraft. Does not include engine mounting or cowling.

5411 Frame/Spar/Rib (Nacelle/Pylon)
For reports pertaining to the main frame, spar, or rib structure on the nacelles or pylons.

5412 Bulkhead/Firewall (Nacelle/Pylon)
For reports pertaining to the bulkhead or firewall structure on the nacelles or pylons.

5413 Longeron/Stringer (Nacelle/Pylon)
For reports pertaining to the longeron or stringer structure on the nacelles or pylons.

5414 Plate/Skin (Nacelle/Pylon)
For reports pertaining to the plates or skins on the nacelles or pylons.

5415 Attach Fitting (Nacelle/Pylon)
For reports on the fittings on the nacelles/pylons used for the attachment to its connecting structure, powerplant, thrust reverser, and for the support of equipment within the nacelle/pylon.


5500 Empennage Structure
The horizontal and vertical stabilizers include the structure of the elevator and rudder. For general reports of empennage structure which affect two or more surfaces or are reported with insufficient information to file in a more specific JASC 5500 series code. This code is also used for reports that pertain to flying wires.

5510 Horizontal Stabilizer Structure
For reports pertaining to the structural aspects of horizontal stabilizer and stabilators or canard. Includes fuselage and boom surface attach fittings. Does not include actuating mechanism filed in JASC code 2742.

5511 Spar/Rib (On Horizontal Stabilizer)
For specific reports of spars/ribs on the horizontal stabilizer.

5512 Plate/Skin (On Horizontal Stabilizer)
For specific reports of plates/skins on the horizontal stabilizer.

5513 Horizontal Stabilizer Tab Structure
For reports pertaining to the structure and attachment of the tab surface mounted on movable stabilizers and stabilators. Includes hinge brackets and bearings/bushings. Does not include the actuating mechanism filed in JASC code 2740. Typical parts are hinge, skin, rib, spar, etc.

5520 Elevator Structure
For reports pertaining to the structural aspects of the movable airfoil hinged to the horizontal stabilizer for longitudinal control. Includes the "ruddervator" on V-tail aircraft and balance weights. Does not include the stabilator structure which is filed in JASC code 5510 or the torque tubes which are filed under the actuating mechanism in JASC code 2730.

5521 Spar/Rib (On Elevator)
For specific reports of spars/ribs on the elevator.

5522 Plate/Skin (On Elevator)
For specific reports of plates/skins on the elevator.

5523 Elevator Tab Structure
For reports pertaining to the structure of elevator trim surfaces hinged to elevators and "ruddervators." Includes hinge fittings and associated bearings and bolts. Does not include actuating mechanism filed in JASC code 2731.

5530 Vertical Stabilizer
The structural aspects of the fixed vertical surface attached to the fuselage including the dorsal fin.

5531 Spar/Rib (On Vertical Stabilizer)
For specific reports of spars or ribs on the vertical stabilizer.

5532 Plate/Skin (On Vertical Stabilizer)
For specific reports of plates or skins on the vertical stabilizer.

5533 Ventral Structure
For reports pertaining to the ventral structure and skin of the ventral fin mounted on the lower, aft fuselage for added directional stability. Typical parts are skin, rib, rivet, and miscellaneous parts, etc.

5540 Rudder Structure
For reports pertaining to the structural aspects of the vertical airfoil hinged to the vertical stabilizer. Does not include the actuators, actuator mechanism or mounting which are filed in JASC code 2720. Typical parts are hinge, hinge fittings, bearing, bolt, miscellaneous structure, etc.

5541 Spar/Rib (On Rudder)
For specific reports pertaining to spars or ribs on the rudder structure.

5542 Plate/Skin (On Rudder)
For specific reports pertaining to plates or skins on the rudder structure.

5543 Rudder/Tab Structure
For reports pertaining to the structure of the movable surface hinged to the rudder surface for directional trim. Typical parts are skin, hinge fitting, spar, rib. The actuating mechanism is filed in JASC code 2720.

5550 Attach Fitting (Empennage Flight Control Surfaces)
For miscellaneous reports of fittings on the empennage structure which are used for the support of the flight control, but are not specifically addressed in JASC codes 5551 through 5554.

5551 Horizontal Stabilizer Attach Fitting
For specific reports pertaining to the fittings on the horizontal stabilizer which are used to support equipment within the structure.

5552 Elevator/Tab Attach Fitting
For specific reports pertaining to the fittings on the elevator or elevator tab which are used to support equipment within the structure.

5553 Vertical Stabilizer Attach Fitting
For specific reports pertaining to the fittings on the vertical stabilizer which are used to support equipment within the structure.

5554 Rudder Attach Fitting
For specific reports pertaining to the fittings on the rudder which are used to support equipment within the structure.


5600 Window/Windshield System
For reports pertaining to the fuselage and crew compartment windows inclusive of windshields. For reports of cockpit and cabin window or windshield defects reported with insufficient information to file in a specific JASC 5600 series code.

5610 Flight Compartment Windows
For reports of all cockpit windows, cockpit overhead canopies, observation windows, and windshield panels in the flight compartment. Includes attachment and sliding feature of sliding windows. For cockpit windows including the breakage of electrically heated windshield panels regardless of cause. Does not include the heating aspects associated circuitry of heated windshields, which is filed in JASC code 3040. Typical parts are windshield, sliding window, seal, frame, panel, latch, hinge, chin bubbles, etc.

5620 Passenger Compartment Windows
For reports of cabin mounted windows in the passenger compartments. Includes the inner and outer windows, frame attaching hardware, picture windows. Does not include the windows in the escape hatches which are filed in JASC code 5220.

5630 Door Windows
For reports of windows mounted in doors. Does not include emergency exit windows which are filed in JASC code 5220.

5640 Inspection Windows
For windows used for examining compartments and equipment in and about the aircraft such as door latches, and cargo bays.


5700 Wing Structure
For reports pertaining to the center wing and outer wing structural units and associated components and members which support the aircraft in flight. This code should be used for general reports of the primary wing structure.

5710 Wing Main Frame Structure
For general reports of wing structure defects which affect two or more related parts or are reported with insufficient information to file in a more specific 5700 JASC code. Does not include reports pertaining to fuel tank sealing which are filed in JASC code 2810. Excessive use of this code should be avoided if possible.

5711 Spar (On Wing)
For reports pertaining to the spar in the wing structure.

5712 Rib/Bulkhead (On Wing)
For reports pertaining to the ribs/bulkhead in the wing structure.

5713 Longeron/Stringer (On Wing)
For reports pertaining to the longerons or stringers in the wing structure.

5714 Center Wing Box (On Wing)
For reports pertaining to the center wing box structure.

5720 Wing Miscellaneous Structure
For reports of the auxiliary or miscellaneous wing structure. Includes the secondary items used for attachment. Does not include reports for plates or skins. Typical parts are wing tip, clips, brackets, channels, angles, stiffeners, etc.

5730 Plate/Skin (On Wing)
For reports of the exterior covering of the wing including the access covers, tip tank fillets, or fairings. Includes the leading edge and trailing edge skin and wing mounted fuel compartment panels.

5740 Attach Fitting (On Wing)
The structure on the wing used for the attachment of fuselage, nacelle or pylon, and landing gear to the wing and for the support of equipment within the wing. Use this code for reports of wing attachments that can not be specifically identified in JASC codes 5741 through 5744. Does not include flight control or landing gear actuator support fittings which should be coded in the appropriate JASC 2700 or 3200 series code.

5741 Fuselage Attach Fitting (On Wing)
The fittings on the wing used for attachment to the fuselage structure.

5742 Nacelle/Pylon Attach Fitting (On Wing)
The fittings on the wing used for attachment to the nacelle/pylon.

5743 Landing Gear Attach Fitting (On Wing)
The fittings on the wing used for attachment to the landing gear.

5744 Control Surface Attach Fitting (On Wing)
The fittings on the wing used for attachment to the control surface.

5750 Flight Surface (On Wing)
For reports of a general nature involving control surfaces which are attached to the wing.

5751 Ailerons
For reports pertaining to the structural aspects of the aileron mounted on the trailing edge of wing. Includes hinges, balance weights. Does not include operating mechanism which causes the surface to move which is filed in JASC code 2710. Typical parts are skin, rib, spar, hinge, bracket, bolt, bearing, bushing, balance weight, etc.

5752 Aileron Tabs
For reports pertaining to the structural aspects of the surface mounted at the trailing edge of the aileron for lateral trim. Does not include the operating mechanism filed in JASC code 2711. Typical parts are spar, skin, hinge, bracket, bolt, bearing, bushing.

5753 Trailing Edge Flaps
For reports pertaining to the structural aspects of the flap surface mounted on the trailing edge of the wing (includes fore, mid, and aft segments). Does not include the operating mechanism such as the actuators, brackets, hydraulic or electric motors. Typical parts are skin, rib, spar, flap track, roller, flap carriage, bearing, bolt, rivet, etc.

5754 Leading Edge Devices
For reports pertaining to the structural aspects of the wing leading edge device control surface. Includes hinge, brackets, bolts but does not include actuators or actuator mounting brackets which are filed in JASC code 2782. Typical parts are skin, rib, track, roller, bearing, carriage, etc.

5755 Spoilers
For reports pertaining to the structural aspects of the movable surface on the upper surface of the wing for drag and lift reducing functions. Does not include operating mechanism such as actuators, hoses, lines which are filed in JASC codes 2760 and 2761. Typical parts are skin, rib, gusset plate, spoiler and actuator support fittings.


7100 Powerplant System
For general reports concerning the powerplant package. Avoid the use of this code if enough information is provided to file in a more specific JASC 7100 series code.

7110 Engine Cowling System
The enclosure which houses engines for drag reducing and cooling. Includes attachment, structure and access doors. Does not include engine cylinder baffles of fire seals. Typical parts are latch, fastener, lockpin, hook, skin, nose cap, stud, access door, hinge, hinge pin, rivet, bracket, stiffener, etc.

7111 Cowl Flap System
The structural and control aspects of movable flaps mounted in engine cowling for increased cooling air flow. Also includes the component which electrically or hydraulically actuates the cowl flaps. Typical parts are actuator, piston, seal, hinge bracket, skin, doubler, rod, rod end, lever, rivet, bolt, and flap, etc.

7112 Engine Air Baffle Section
For reports of baffles which direct cooling air flow to the engine cylinders and accessories. Does not include cylinder baffles certificated with the engine which are filed in JASC code 8530. Typical parts are baffle, shield, bracket, shroud, cooling ducts for starters, and generators, etc.

7120 Engine Mount Section
The structural framework which supports the engine on the nacelle, firewall or pylon. Typical parts are mount, bracket, fitting, shock mount, bolt, isolator, hanger, etc.

7130 Engine Fireseals
The fire resistant partitions and seals mounted on or about the power package to isolate areas subject to fire. Does not include firewalls which are filed in JASC code 5412. Typical parts are shroud, bracket, etc.

7160 Engine Air Intake System
The portion of the powerplant system which directs airflow to the engine. Does not include integral structure with the airframe, which shall be included in the applicable structures JASC chapter. Typical parts are carburetor air heat doors, alternate air doors, linkages, controls, filter element, ducts, hose, air box, latch, seals, nose ring cowls, scoops, compressor fan cowls, buried engine ducts, vortex generators, actuators, control handles, cables, wiring, plumbing, doors, warning systems, position indicators, etc.

7170 Engine Drains
The components and manifold assemblies which are used to drain off excess fluids from the powerplant and its accessories. Includes components that are integral parts of, or fitted to the powerplant cowling. Typical parts are drain line, manifold, flame arrestors, support brackets, etc.


7200 Engine (Turbine/Turboprop)
The units and components which are used to induce and convert fuel-air mixture into power, and transmit power to the propeller shaft (if any) and accessory drives. Full identification of the powerplant is required in all reports in JASC series codes 7200 through 8300 to increase the usability of the reports. Use this code for general reports concerning engine problems reported with insufficient information to file in a more specific JASC code. Includes reports pertaining to bird strikes to engines/cowling.

7210 Turbine Engine Reduction Gear
For reports pertaining to reduction gears, combining gearboxes, propeller drive shafts, and helicopter rotor shafts, which are used to transfer power from turboprop and turboshaft engines, to the propeller or helicopter rotor. Do not use this code for accessory devices attached to reduction gearboxes. Typical parts are shaft, gear, bearing, case, torque piston, transfer tube, chip detector, etc.

7220 Turbine Engine Air Inlet Section
The engine section through which air enters the compressor section. Typical parts are inlet case, inlet cone, inlet screen, guide vane, inlet scroll, etc.

7230 Turbine Engine Compressor Section
The engine section where incoming air is compressed. Does not include the operation of variable stator blades, linkage to the various valves and sense lines filed in JASC code 7530. Typical parts are case, the rotating portion of the compressor, lines, fan blades, disc, bearing, seal, mount, carbon seal, disc tie bolts, shaft, etc.

7240 Turbine Engine Combustion Section
The engine section in which fuel and air are mixed and burned. Typical parts are case, burner can, liner, vane ring, etc.

7250 Turbine Section
The engine section which contains the turbine disc and associated nozzles and cases. Typical parts are case, disc, blade, nozzle, bearing, bearing cover, power turbine, shaft, tie bolts, seals, etc.

7260 Turbine Engine Accessory Drive
The engine mounted gearbox which provides mechanical power takeoffs to drive accessories such as pumps, generators, chip detectors. Does not include the remote gearboxes which are filed in JASC code 8300.

7261 Turbine Engine Oil System
The system components and parts which provide lubricating oil pressure, circulation and scavenging throughout the engine. Does not include externally mounted storage tanks filed in JASC code 7910, coolers in JASC code 7921, or connecting lines in JASC code 7920. Typical parts are relief valve, fitting, seal, pump, screen, filter, seal, check valve, element, etc.

7270 Turbine Engine Bypass Section
For the non-rotating portion of engine air flow ducting for the prime purpose of adding to engine thrust of turbo-jet engines. Does not include the rotating components such as blades. Typical parts are duct, skin, duct segment, etc.


7300 Engine Fuel & Control
For general reports of turbine or reciprocating engine fuel systems with insufficient information to file in a more specific JASC 7300 series code.

7310 Engine Fuel Distribution
For components and parts of the engine fuel system from the main quick disconnect fitting or airframe fuel system strainer to the fuel control unit. Does not include the controlling or metering aspects filed in JASC code 7322, or the primer systems in JASC code 2820 on reciprocating engines, or the engine fuel pumps, fuel heater, cooler, divider, or injector nozzle (turbine and piston engines). Typical parts are supply lines, hoses, fuel, filters on turbine engines, shutoff and solenoid valves, etc.

7311 Engine Fuel/Oil Cooler
The unit in which aircraft fuel flows to cool the turbine engine lubricating oil. Does not include the connecting lines.

7312 Fuel Heater
The unit which heats fuel flowing to the engine to prevent freezing of entrapped water. Does not include connecting lines or the heat source.

7313 Fuel Injector Nozzle
The unit which injects metered fuel into piston engine cylinders and burner cans in turbine engines.

7314 Engine Fuel Pump
For reports pertaining to engine fuel pumps. Typical parts are housing, spring, rocker, pump, diaphragm, shaft, seal, relief valve, regulator, coupling, etc.

7320 Fuel Controlling System
The system components or parts other than the fuel control, amplifier, computer, carburetor and indication systems which control and deliver metered fuel/air to engine cylinders or turbine engine burner cans. Typical parts are sense line, power and drain valve (P & D valve), drain valve, carburetor inlet temperature sensor, etc.

7321 Fuel Control/Electronic
The components which electronically control metered fuel flow under infinite temperature, altitude, and barometric pressure conditions. Typical parts are computer, amplifier, sync box, CIT sensor, etc.

7322 Fuel Control/Carburetor
The component which meters fuel/air mixture for engine combustion, both reciprocating and turbine engines. This code is to be used for turbine engines which utilize non-electronic fuel controls. For reciprocating engines, typical parts are carburetor, fuel injector, float, diaphragm, bellows, shaft, venturi, control arm, throttle body, servo, discharge tube, bushing, needle, seat, accelerator pump, pin, bearings, etc.

7323 Turbine Governor
The component which controls the RPM of turbine engines. Typical parts are governor, shaft, overspeed limiter, topping governor, etc.

7324 Fuel Divider
The unit in metered fuel lines which directs fuel to individual cylinders or burner cans.

7330 Engine Fuel Indicating System
For reports of fuel temperature, flow rate, or pressure indicating and warning systems other than the indicators, sensors, and transmitters. Typical parts are line, hose, lamp, bulb, wiring harness, circuit breaker, etc.

7331 Fuel Flow Indicating
The instrument which indicates the flow rate of metered fuel to the engine. Does not include the transmitter. Typical parts are indicator, power supply, needle, dial, etc.

7332 Fuel Pressure Indicating
The instrument which indicates the pressure of fuel at the fuel control/carburetor as provided by the engine driven or motor driven pumps. Includes the pressure warning indicating lamps. Typical parts are indicator, bourdon tube, diaphragm, needle, case, etc.

7333 Fuel Flow Sensor
The unit and associated circuitry and parts which senses and transmits the rate of fuel flow to the cockpit indicator. Typical parts are transmitter, sensor, fitting, connector, transducer, etc.

7334 Fuel Pressure Sensor
The units which sense and transmit to the cockpit indicator or indicator lamps, the pressure of fuel available at the engine fuel control/carburetor. Includes pressure switch and circuitry for warning indication. Typical parts are transducer, transmitter, switch, etc.


7400 Ignition System
For general reports of ignition problems with insufficient information to file in a more specific JASC 7400 series code.

7410 Ignition Power Supply
The units and components which generate, control, furnish or distribute an electrical current to ignite the fuel air mixture in cylinders of reciprocating engines or in the combustion chambers or thrust augmentors of turbine engines.

7411 Low Tension Coil
For reports of magneto coils used on select engines such as the Pratt & Whitney (PWA), Model R2800, to generate a low tension voltage to high tension voltage coil mounted at each engine cylinder. Not generally used on modern light aircraft reciprocating engines.

7412 Exciter
The unit used with turbine engine ignition systems for starting engines. Typical parts are exciter box, bracket, relay. The component make and model should be included.

7413 Induction Vibrator
The unit which provides a high tension spark to reciprocating engine spark plugs for starting.

7414 Magneto/Distributor
The components which generate and distribute a high voltage to spark plugs in reciprocating engines for fuel/air combustion. Typical parts are coil, breaker points, gear, bearing, contact finger, distributor block, frame, impulse coupling, condenser, rotor, cam, electrode, seal, etc.

7420 Ignition Harness (Distribution)
The high tension insulated wiring from the magneto to the spark plug in reciprocating engines which provides a spark for combustion. For turbine engine, the high tension leads to burner can igniters for used for starting. Typical parts are lead, shielding, sleeve, ignition cable, terminal, ferrule, etc.

7421 Spark Plug/Igniter
The part which provides the spark in the reciprocating engine cylinders or combustion chamber of turbine engines.

7430 Ignition Switching
The unit which provides a means of rendering the ignition power supply (magneto) inoperative. Also used to direct electrical current to the engine starter motor. Typical parts are start button, switch, back plate, contacts, etc.


7500 Engine Bleed Air System
For general reports of turbine engine compressor bleed air systems used to control the flow of air through the engine, cooling air systems, and heated air for engine anti icing reported with insufficient information to file in a more specific JASC 7500 series code.

7510 Engine Anti-Icing System
The engine system components and parts used to eliminate and prevent the formation of ice. Includes the control valve and associated actuator, switch and circuitry which controls the flow of turbine engine compressor bleed air to the engine anti-icing system. Anti-icing reports pertaining to the powerplant cowling are filed in JASC code 3020. Typical parts are control valve, actuator, motor, switch, relay, circuit breaker, hose, manifold, coupling, fuel heat duct, fuel heat valve, etc.

7520 Engine Cooling System
The portion of the engine compressor bleed air system which is used to ventilate engine compartments and accessories. Does not include the engine bleed control valve which is filed in JASC code 7532. Typical parts are jet pumps, vortex generators, valve, actuator, and associated parts and circuitry used to control bleed air to engine accessory cooling systems.

7530 Compressor Bleed Control
The system except valve and governor which controls the flow of air through turbine engines. Includes the operation of variable stator blades, linkage to the various valves and sense lines. Typical parts are sense line, stator vane, fitting, cable, sense line filter, speed sense valve, etc.

7531 Compressor Bleed Governor
The unit controlling relative position of the compressor bleed valve in turbine engines for air flow control.

7532 Compressor Bleed Valve
The component which releases air from turbine engine compressor sections for air flow control. Typical parts are bleed valve, actuator, check valve, etc.

7540 Bleed Air Indicating System
The systems which indicate temperature, pressure, control positions and warning indications of turbine engine compressor bleed air systems in turbine engines. Typical parts are transmitter, sensor, indicator, lamp, pressure switch, etc.


7600 Engine Controls
The controls which govern the operation of the engine. Includes units and components which are interconnected for emergency shutdown. For turboprop engines, includes linkages and controls to the coordinator or equivalent to the propeller governor, fuel control unit or other units being controlled. For reciprocating engines, includes controls for blowers. Does not include units or components which are specifically included in other chapters. For general reports of engine control problems with insufficient information to file in a more specific JASC 7600 series code.

7601 Engine Synchronizing
The components providing for engine synchronization in multi-engine aircraft.

7602 Mixture Control
The control for adjusting fuel-air mixture in piston engines. Includes linkage from the cockpit lever to the carburetor or fuel injector servo but does not include the arm on mixture control shafts. Typical parts are cable, rod, bellcrank, rod end, housing, clamp and cockpit control lever/knob.

7603 Power Lever
The system which provides for control of carburetor or fuel injectors on piston engines; fuel controls or coordinator on turbine engines; and propeller regulator turboprop engines. Typical parts are cable, rod, rod end, bellcrank, bracket, clamp, actuator, shaft, shaft pin, knob, etc.

7620 Engine Emergency Shutdown System
The system which provides for rapid, complete shutoff of combustible fluids to the engine compartments during emergency procedures. Typical parts are cable, actuator, switch, lever, etc.


7700 Engine Indicating System
For general reports of engine indicating system discrepancies with insufficient information to file in a more specific JASC 7700 series code. This code is also used for reports with multiple engine indications.

7710 Power Indicating System
For power indicating systems which directly or indirectly indicates power or thrust (i.e., brake mean effective pressure {BMEP}, engine pressure ratio {EPR}, RPM, etc.) but is not covered in JASC codes 7711 through 7722.

7711 Engine Pressure Ratio (EPR)
The system which sense, measures, and indicates the engine pressure ratio (EPR) of an turbine engine. The system measures the difference between the compressor inlet pressure and the turbine discharge pressure. Typical parts are sensor, transducer, transmitter, probe, etc.

7712 Engine BMEP/Torque Indicating
The system that senses and measures brake mean effective pressure (BMEP) or engine torque in turbo-prop and piston engines. Does not include internal parts which are type certificated with the engine. Typical parts are indicator, line, sensor, transmitter, pressure switch, etc.

7713 Manifold Pressure (MP) Indicating
The reciprocating engine manifold pressure (MP) indicating system including the indicator and sensor. Typical parts are lines, hoses and fittings.

7714 Engine RPM Indicating System
The system including the indicator and sensor which indicates engine speed in revolutions per minute (RPM). Typical parts are, cable, connector, tachometer, tachometer generator, N1 indicator.

7720 Engine Temperature Indicating System
For general reports of the system components and parts which indicate engine temperature with insufficient information to file in a more specific JASC 7700 series code.

7721 Cylinder Head Temperature (CHT) Indicating System
The instruments which indicates temperature measured at reciprocating engine cylinder heads. Typical parts are indicator, case, dial, needle, thermocouple lead, sensor, and connector, etc.

7722 Engine EGT/TIT Indicating System
For reports of exhaust gas temperature (EGT) or turbine inlet temperature (TIT) temperature sensing and indicating. Includes the EGT indicators for both reciprocating and turbine engines; and the TIT for turbine engines. Typical parts are wiring, turbine outlet temperature (TOT) indicator, EGT indicator, probe, harness, terminal, connector, indicator, sensor, transducer, transmitter, etc.

7730 Engine Ignition Analyzer System
For general reports of reciprocating engine ignition analyzer system problems. Typical parts are the amplifier, wiring harness, and sensor, etc.

7731 Engine Ignition Analyzer
The unit which interprets and indicates by oscilloscope the condition of ignition systems on reciprocating engines.

7732 Engine Vibration Analyzer
For general reports of the engine vibration analyzer system indicating to the flight crew unusual engine vibration conditions. Typical parts are connector, harness, indicator, monitor, sensor, amplifier, etc.

7740 Engine Integrated Instrument System
The portion of the system which is an integrated concept that receives engine operating parameters and transmits them to a central processor for cockpit presentation. Typical parts are the display units, transmitters, receivers, computers, etc.


7800 Engine Exhaust System
For general reports of engine exhaust system defects with insufficient

information to file in a more specific JASC 7800 series code.

7810 Engine Collector/Tailpipe/Nozzle
That portion of the system which collects the exhaust gases from the cylinders, turbines, or turbochargers and conducts them overboard. Includes variable vanes, or nacelle tailpipes used on turboprop powered aircraft and turbo-shaft powered rotorcraft. Typical parts are tailpipe, cone, nozzel, clamp eyebolt, duct, ejector, etc.

7820 Engine Noise Suppressor
For general reports of muffler system defects. The component used on reciprocating engines to reduce engine exhaust noise. Does not include the shroud over the muffler used to collect heated fresh air for cabin and carburetor heat filed in JASC code 2140. Includes the clover leaf shaped unit mounted on turbo-jet engine exhaust tailpipes for sound suppression. Typical parts are baffle, cone, and flame tube, etc.

7830 Engine Exhaust Thrust Reverser
The airframe furnished system and components mounted at turbo-jet engine exhaust tailpipes to direct engine thrust forward for deceleration. Does not include the engine tailpipe. Typical parts are door, flex drive, relay, solenoid, switch, switch arm, bolt, valve, line, deploy line, rail, cable, actuator, actuator rod, connector plug, seal, support, fitting, shaft, link, nozzle, hose, etc.


7900 Engine Oil System (Airframe Furnished)
For general reports of system units external to the engine which store and deliver engine lubricating oil to and from both turbine and reciprocating engines with insufficient information to file in a more specific JASC 7900 series code.

7910 Engine Oil Storage (Airframe Furnished)
The engine oil storage tank furnished by the airframe manufacturer. Includes attached parts such as filler caps, mount brackets, but excludes engine manufacturer furnished tanks, quantity indication systems, and distribution lines. Typical parts are tank, cap, seal, bracket, drain valve, etc.

7920 Engine Oil Distribution (Airframe Furnished)
The external oil system which distributes engine lubricating oil from the storage tanks to and from the engine. Does not include externally mounted units such as oil coolers, oil filters, shutoff valves. Typical parts are line, hose, coupling, fitting, clamp, etc.

7921 Engine Oil Cooler
The component and associated parts that cools engine lubricating oil. Includes brackets, outlet doors, scoops, ducts and louvers, but excludes the temperature regulator. Typical parts are cooler, duct, scoop, door, door actuator, etc.

7922 Engine Oil Temperature Regulator
The unit which is mounted on the airframe oil cooler or the engine for controlling engine lubricating oil temperature. Typical parts are thermostat, thermal valve, regulator, etc.

7923 Engine Oil Shutoff Valve
The component and associated controls which stop the flow of lubricating oil to the engine for emergency purposes.

7930 Engine Oil Indicating System
For general reports of engine oil pressure, temperature and quantity and those reports with insufficient information to file in a more specific JASC 7900 series code. Includes oil filter bypass switch, chip detector light, indicators, etc.

7931 Engine Oil Pressure
The instrument or warning lamp which indicates, senses, or transmits the pressure of engine lubricating oil available at the engine or when the pressure is improper for the conditions. Typical parts are transducer, pressure switch, transmitter, indicator, case, dial, needle, lamp, etc.

7932 Engine Oil Quantity
The instrument or warning lamp which senses or indicates the quantity of oil in supply tanks or warns of an insufficient quantity. Typical parts are transmitter, indicator, case, lamp, etc.

7933 Engine Oil Temperature
The instrument which senses and indicates temperature of engine oil. Typical parts are sensor, temperature bulb, case, indicator, needle, dial, etc.


8000 Engine Starting System
The units, components and associated systems used for starting the engine. Includes electrical, inertia air or other starter systems. Does not include ignition systems which are covered in JASC Chapter 74, IGNITION.

8010 Engine Cranking
The portion of the system which is used to perform the cranking functions of the starting operation. Typical parts are plumbing, valve, wiring switch, relay, etc.

8011 Engine Starter
The component used for starting the engines. Includes parts which are separated from the engine during starter removals, but does not include parts within the engine. Does not include the starter-generator which is filed in JASC code 2435. Typical parts are brush, bearing, shaft, clutch, adaptor, backplate, housing, winding, terminal post, etc.

8012 Engine Start Valves/Controls
The valves and controls used for starting engines.


8200 Water Injection System
The system components and parts which inject a water mixture into induction system of turbine and reciprocating engines. Typical parts are pump, switch, tank, valve, etc.


8300 Accessory Gearboxes
The units and components which are remotely installed and connected to the engine by a drive shaft and which does not include those accessory drives which are bolted to and are immediately adjacent to the engine. The latter item should be filed in JASC code 7200. Does not include accessory drives bolted to and adjacent to engine which are normally filed in JASC code 7260.

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