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ATA Standard Numbering System

Lear 45-1001 Build History

ATA Standard Numbering System

Rev 14 Nov 2018

The L45-1001 introduction contains useful background information on this build. If somehow you have arrived at this place and have not read the L45-1001 introduction you will find it HERE:

The Airline Transport Association (ATA) standard numbering system is used to organize information about aircraft. The ATA system provides standardization in the arrangement of all aircraft publications by use of a simple, uniform, numbering system. The numbering system is a three element dash number that provides a means for dividing material into Chapter, Section, Subject, and Pageblock. It also identifies the hardware that is the subject of the text. For example, ATA Chapter 24 covers Electrical Power, ATA Chapter 27 is Flight Controls, and so on.

The numbering scheme applies to all related publications including maintenance manuals, parts guides, wiring manuals, etc. So if you know that the information you’re looking for is in chapter 53, “Fuselage” you’ll know it’s always under that chapter regardless of the type of manual in which it appears. The ATA standard specifies 116 Chapters and includes subjects specific to flight simulators. For many years the standard was simply known as “ATA 100”. The current version is part of ATA iSpec 2200 and is known as the “ATA Standard Numbering System”.

The Lear 45 Illustrated Parts Catalog (IPC) is a good example document.  It explains:

“The IPC number system is a derivative of ATA 100. It is a three−element number system that divides the manual into chapter/section/figure. The first element identifies the chapters and is per ATA 100. The second element identifies the section and is per ATA 100. The third element identifies the figure and is assigned by Learjet Technical Publications. Each element has two numbers. The example that follows identifies a sample three−element number:”

The Lear 45 Illustrated Parts Catalog (IPC)  includes the following chapters. Notice that all chapters are not required or used for every aircraft type. Chapter 61 “Props/Propulsion”, for example, is not used on jet aircraft, while chapter 65 “Tail Rotor Drive” is for rotorcraft. Chapters 1-4 are “Reserved for Airline Use”. Refer to the ATA standard for complete details.

Major Section 1 − Aircraft General

Chapter           Title                                 Chapter Revision Status

11            Placards and Markings          Issue D, Rev 19, Jun 02/2014

 Major Section 2 − Airframe Systems

Chapter           Title                                  Chapter Revision Status

21            Air Conditioning                      Issue D, Rev 21, May 26/2015

22            Auto Flight                                Issue D, Rev 21, May 26/2015

23            Communications                     Issue D, Rev 21, May 26/2015

24            Electrical Power                       Issue D, Rev 20, Jan 12/2015

25            Equipment/Furnishings        Issue D, Rev 21, May 26/2015

26            Fire Protection                         Issue D, Rev 21, May 26/2015

27            Flight Controls                         Issue D, Rev 21, May 26/2015

28            Fuel                                            Issue D, Rev 21, May 26/2015

29           Hydraulic Power                     Issue D, Rev 21, May 26/2015

30           Ice and Rain Protection        Issue D, Rev 20, Jan 12/2015

31           Indicating/Recording Sys     Issue D, Rev 21, May 26/2015

32           Landing Gear                          Issue D, Rev 21, May 26/2015

33            Lights                                       Issue D, Rev 20, Jan 12/2015

34           Navigation                              Issue D, Rev 21, May 26/2015

35           Oxygen                                    Issue D, Rev 21, May 26/2015

36           Pneumatic                              Issue D, Rev 21, May 26/2015

38          Water/Waste                         Issue D, Rev 15, Jan 21/2013

49          Airborne Auxiliary Power   Issue D, Rev 21, May 26/2015

 Major Section 3 − Structure

Chapter           Title                             Chapter Revision Status

52           Doors                                     Issue D, Rev 21, May 26/2015

53           Fuselage                                Issue D, Rev 21, May 26/2015

54           Nacelles/Pylons                  Issue D, Rev 21, May 26/2015

55           Stabilizers                             Issue D, Rev 19, Jun 02/2014

(Note to Admin:  The spacing of the items in the list above isn't working right.  If I get them lined up correctly in edit mode, they don't display with the same spacings in ordinary reading mode.  Pasted from a pdf document via Word, so who knows what's broken.)

HOME: This link goes to the L45-1001 build history introduction. Links to other L45-1001 posts are found at the END of the introduction.