It was developed by the FAA's, Regulatory Support Division (AFS-600). System/Component (JASC) Code Tables was a modified version of the Air Transport Association of America (ATA), Specification 100 code. While the ATA 100 numbering system has been superseded, it continued to be widely used until it went out of date back in 2015, especially in documentation for general aviation aircraft, on aircraft Fault Messages (for Post Flight Troubleshooting and Repair) and the electronic and printed manuals. The standard numbering system was published by the Air Transport Association on June 1, 1956.
This commonality permits greater ease of learning and understanding for pilots, aircraft maintenance technicians, and engineers alike. ATA 100 contains the reference to the ATA numbering system which is a common referencing standard for commercial aircraft documentation.
