85, N88GA, FAA Type Certificate Data Sheet Al2EA. Rem to: GAC FAA Approved Aircraft Service Cange (ASC) Number 207, SUBJECT' Auxiliary Power Unit (APU) Electronic. Control Unit (ECU) FAULT SIGNAL - IMPROPEMENT: dated: JUNE I, 1992. Related FAA Approved document GAC ASC 8A AnTillny Power (ATA 49) APU FIRE TEST