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PartsPerk reference library
ATA and JASC chapter directory
Find the right section. Start with the aircraft system or a chapter number.
How to use this directory
Choose a group, then open a chapter to see what it covers. Check your aircraft or engine manual before choosing a part.
General and standard practices
Find aircraft markings, hardware and common maintenance practices. Check the aircraft manual for the right material, size and part.
ATA 11
Placards and markings
Aircraft signs, labels and identification markings. Check the aircraft manual for their wording and location.
JASC 14
Hardware
Hoses, tubes, electrical connectors, fasteners and wiring in the FAA JASC hardware section. This section uses the JASC number 14.
ATA 20
Standard practices — airframe
Common aircraft-body maintenance practices, fasteners and electrical connections between metal parts.
Aircraft systems and structures
Browse the aircraft body, wings, landing gear and onboard systems. Use the aircraft manual to check where each part belongs.
ATA 21
Air conditioning
Cabin air pressure, airflow and temperature control.
ATA 24
Electrical power
Systems that generate, supply and protect aircraft electrical power.
ATA 25
Equipment / furnishings
Cabin equipment, seats, kitchens, washrooms and cargo-handling systems.
ATA 26
Fire protection
Systems that detect fire or smoke and put out fires.
ATA 27
Flight controls
Controls and moving surfaces that guide the aircraft, including electrically controlled systems.
ATA 28
Fuel
Aircraft fuel tanks, fuel supply, fuel-level displays and fuel release systems.
ATA 29
Hydraulic power
Systems that produce and supply pressurized hydraulic fluid, with controls and gauges.
ATA 30
Ice and rain protection
Systems that prevent or remove ice and keep rain off aircraft windows.
ATA 32
Landing gear
Main and nose landing gear, wheels, brakes and steering.
ATA 33
Lights
Lighting in the cockpit, passenger areas and outside the aircraft.
ATA 35
Oxygen
Systems that supply oxygen to the crew and passengers.
ATA 36
Pneumatic
Aircraft compressed-air supplies, pipes and valves that carry air to onboard systems.
ATA 37
Vacuum
Systems that produce and supply vacuum, including pumps, controls and gauges.
ATA 38
Water / waste
Drinking water, washing water, water-pressure systems and waste removal.
ATA 51
Standard practices and structures (general)
Common practices for working on the aircraft structure.
ATA 52
Doors
Passenger, cargo, service and emergency-exit doors.
ATA 53
Fuselage
The main aircraft body and the structure that holds cabin air pressure.
ATA 54
Nacelles / pylons
Engine covers, surrounding structures and engine support attachments.
ATA 55
Stabilizers
Horizontal and vertical tail structures that help keep the aircraft stable.
ATA 56
Windows
Cockpit, passenger and door windows.
ATA 57
Wings
Wing structures and the attachments for their moving control surfaces.
Engines and propellers
Find engine, propeller and related system chapters. Include the engine model and full part number, including its ending, in your request.
ATA 49
Auxiliary power unit
A small onboard power unit that supplies power separately from the main engines.
ATA 61
Propellers / propulsors
Propellers, their controls, brakes and indicators. Check the aircraft manual for the right blades, hubs and control units.
ATA 70
Standard practices — engine
Common engine maintenance practices.
ATA 71
Power plant
The complete engine installation, including its covers and mounts.
ATA 72
Engine — turbine / turboprop
Turbine-engine sections that compress air, burn fuel and turn engine shafts, plus drives for related equipment.
ATA 73
Engine fuel and control
Systems that supply, measure and control fuel within the engine.
ATA 74
Ignition
Equipment that supplies and controls the spark used to start or run an engine. Check the engine model and full part number.
ATA 75
Air
Engine airflow, cooling and compressor air controls. Engine starting has its own section in chapter 80.
ATA 76
Engine controls
Controls for engine power and emergency shutdown. Check the exact unit and any required software before choosing a replacement.
ATA 77
Engine indicating
Sensors and displays for engine power, temperature and condition. Check the exact equipment and location in the engine manual.
ATA 78
Engine exhaust
Engine exhaust, noise-reduction equipment and systems that reverse thrust. Check the installed assembly before choosing a replacement.
ATA 79
Oil
Engine oil tanks, oil supply and oil-level or pressure displays.
ATA 80
Starting
Equipment that starts and turns the engine. Check the engine and aircraft model for the right starter, drive and controls.
ATA 81
Turbocharging
Turbochargers and their controls on piston engines. Check the engine model and exact turbocharger part number.
ATA 82
Water injection
Water-injection tanks, pipes and controls on engines that use this system. Check the engine manual before selecting parts.
ATA 83
Accessory gearboxes
Engine gearboxes and drives for related equipment. Check the gearbox assembly and full part number before requesting a replacement.
JASC 85
Reciprocating engine
Engines with pistons that move back and forth. FAA JASC lists these under family 85; check the engine manual for its chapter numbering.
Radios, navigation and instruments
Browse radios, navigation equipment, displays and maintenance computers. Check the exact equipment model and software version when needed.
ATA 22
Auto flight
Systems that help control the aircraft automatically, including its flight path and engine power.
ATA 23
Communications
Aircraft radios, satellite communications, onboard messages and crew audio.
ATA 31
Indicating / recording systems
Cockpit displays, flight-data recorders, voice recorders and maintenance displays.
ATA 34
Navigation
Equipment that helps locate and guide the aircraft, including radio landing aids, traffic information and weather radar.
ATA 45
Central maintenance system
Computers and wiring used to monitor maintenance needs. Check the equipment model and software version separately.
Helicopter systems
Find rotor, drive, vibration and flight-control chapters. Use the helicopter manual to check the right part for its model and location.
ATA 18
Helicopter vibration
Equipment used to measure helicopter vibration and noise. Check the helicopter manual for the right sensors and equipment.
ATA 62
Main rotor
Main rotor blades, hubs and the links that change blade angle.
ATA 63
Main rotor drive
The main rotor gearbox, drive shafts and freewheel unit.
ATA 64
Tail rotor
Tail rotor blades, hubs and blade-angle controls.
ATA 65
Tail rotor drive
Drive shafts and gearboxes that carry power to the tail rotor.
ATA 67
Rotors flight control
Helicopter flight controls and the links that move them. Check the helicopter manual for the right part and location.
Servicing and support
Find references for aircraft fluids and servicing equipment. Check the aircraft servicing instructions for the correct material and tools.
ATA 12
Servicing
Servicing with fuel, oil, hydraulic fluid and coolant. Follow the aircraft instructions for the correct materials and equipment.
About the chapter references
ATA numbers organize aircraft manuals by system. The FAA also uses a related system called JASC. This directory includes all 51 two-digit groups in the FAA JASC reference, updated October 27, 2008, plus the airframe and engine standard-practice chapters. JASC 14 and JASC 85 are labeled separately.
This is a reference directory, not a complete current aircraft parts manual or iSpec 2200 standard. Check the aircraft or engine manual before choosing a part.