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ATA 100 - Aircraft Numbering System

ATA Chapters, also known as the ATA 100 System Codes, refers to the categorization of parts as organized by the Air Transport Association. These numbers will typically be found in any Component Maintenance Manual (CMM) for any civilian aircraft and one category can consist of several subcategories for different parts. As an example, ATA Chapter 22 refers to Air Conditioning, meaning that ATA Chapter 22 parts can fit into any subcategory fitting shut-off valves, fans, rotary actuators, check valves, butterfly valves, skin air valves, cabin pressure valves, regulator valves, rate control valves, ducts, plenum assemblies, syphon assemblies, etc. 

Here at ASAP Aerospace, we also categorize our inventory by ATA Chapter Groups. Use our online parts directory and you’ll see that you can search parts by the ATA Group or Chapter number. We have over 6 billion parts in our inventory, including new, old, and obsolete. Our vast and diverse inventory list is just one of the reasons why we have led the pack as a top independent parts distributor in the aviation industry.

ASAP is proud of the work we’ve contributed in making sure our parts our 100% airworthy. With an ISO 9001:2015 certification and an FAA AC 00-56B accreditation, our customers have full faith in us to abide by FAA regulations. Each and every part that is sourced by us is rigorously tested for quality assurance and screened for proper certifications before it is approved for customer delivery. 

We have supply chain locations across the US and Canada, which means that we are able to provide fast and expedited shipping to our customers, ranging from a few days to a few weeks faster than a majority of our competitors. 

Contact us today and see how quickly we can help you find the ATA Chapter parts that you need! Submit an Instant RFQ and a team representative can contact you in as little as 15 minutes. 

Aircraft General

ATA Number ATA Chapter name
ATA 00 General
ATA 01 Maintenance Policy
ATA 02 Operations
ATA 03 Support
ATA 04 Airworthiness Limitations
ATA 05 Time Limits/Maintenance Checks
ATA 06 Dimensions And Areas
ATA 07 Lifting And Shoring
ATA 08 Leveling And Weighing
ATA 09 Towing And Taxiing
ATA 10 Parking, Mooring, Storage And Return To Service
ATA 11 Placards And Markings
ATA 12 Servicing
ATA 13 Hardware And General Tools
ATA 15 Aircrew Information
ATA 16 Change Of Role
ATA 18 Vibration And Noise Analysis (Helicopter Only)

Aircraft Systems

ATA Number ATA Chapter name
ATA 20 Standard Practices- Airframe
ATA 21 Air Conditioning
ATA 22 Auto Flight
ATA 23 Communication
ATA 24 Electrical Power
ATA 25 Equipment /Furnishings
ATA 26 Fire Protection
ATA 27 Flight Controls
ATA 28 Fuel
ATA 29 Hydraulic Power
ATA 30 Ice And Rain Protection
ATA 31 Indicating / Recording System
ATA 32 Landing Gear
ATA 33 Lights
ATA 34 Navigation
ATA 35 Oxygen
ATA 36 Pneumatic
ATA 37 Vacuum
ATA 38 Water / Waste
ATA 39 Electrical - Electronic Panels And Multipurpose Components
ATA 40 Multisystem
ATA 41 Water Ballast
ATA 42 Integrated Modular Avionics
ATA 44 Cabin Systems
ATA 45 Onboard Maintenance Systems (Oms)
ATA 46 Information Systems
ATA 47 Inert Gas System
ATA 48 In Flight Fuel Dispensing
ATA 49 Airborne Auxiliary Power


ATA Number ATA Chapter name
ATA 91 Charts
ATA 97 Wiring Reporting
ATA 115 Flight Simulator Systems
ATA 116 Flight Simulator Cuing System

Peculiar Military Chapters

ATA Number ATA Chapter name
ATA 92 Electrical Power Multiplexing
ATA 93 Surveillance
ATA 94 Weapon System
ATA 95 Crew Escape And Safety
ATA 96 Missiles, Drones And Telemetry
ATA 98 Meteorological And Atmospheric Research
ATA 99 Electronic Warfare System

Power Plant

ATA Number ATA Chapter name
ATA 71 Power Plant
ATA 72 Engine
ATA 72T Engine - Turbine/Turboprop, Ducted Fan/Unducted Fan
ATA 72R Engine - Reciprocating
ATA 73 Engine - Fuel And Control
ATA 74 Ignition
ATA 75 Bleed Air
ATA 76 Engine Controls
ATA 77 Engine Indicating
ATA 78 Exhaust
ATA 79 Oil
ATA 80 Starting
ATA 81 Turbines (Reciprocating Engines)
ATA 82 Water Injection
ATA 83 Accessory Gear Box (Engine Driven)
ATA 84 Propulsion Augmentation


ATA Number ATA Chapter name
ATA 60 Standard Practices - Prop./Rotor
ATA 61 Propellers/ Propulsors
ATA 62 Main Rotor(S)
ATA 63 Main Rotor Drive(S)
ATA 64 Tail Rotor
ATA 65 Tail Rotor Drive
ATA 66 Folding Blades/Pylon
ATA 67 Rotors Flight Control


ATA Number ATA Chapter name
ATA 50 Cargo And Accessory Compartments
ATA 51 Standard Practices And Structures - General
ATA 52 Doors
ATA 53 Fuselage
ATA 54 Nacelles/Pylons
ATA 55 Stabilizers
ATA 56 Windows
ATA 57 Wings
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