This code table was constructed by using the new JASC code four digit format, along with an abbreviated code title.
It was developed by the FAA's, Regulatory Support Division (AFS-600). The Joint Aircraft 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 While the ATA 100 numbering system has been superseded, it continued to be widely used until it went out of date back in 2015, especially in documentation for aircraft, on aircraft Fault Messages (for Post Flight Troubleshooting and Repair) and the electronic and printed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 on June 1, 1956.
This commonality permits greater ease of learning and understanding for, and alike. ATA 100 contains the reference to the ATA numbering system which is a common referencing standard for documentation.
