JASC Code Joint Aircraft System/Component
The JASC Code Table is a modified version of the Air Transport Association (ATA) Spec 100 Code. It was developed in 1991 by AFS-600 for technical classification of SDR’s.
The JASC Code Table contains abbreviated titles that clarify the intended use of the code.
ATA Spec 100 Codes contain three (3) digits -- JASC Codes use a four (4) digit format.
For Example: In ATA chapter 24, Electrical Power, the JASC Code for Electrical Power System Wiring is 2497. In chapter 29 Hydraulics, the JASC Code for Hydraulic Power System Wiring is 2997.
The JASC Code Table and Definitions can be found on FAA website
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