COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Auxiliary Power Units AD/APU/2 Inspection, Placard, Operational NK Limitations and/or Modification Applicability: Airesearch Model No. GTCP660-4 with S/Nos. P-37501 to P-37723 and Model No. GTC660-4R with S/Nos. P-101 to P-124 not modified in accordance with Airesearch SB No. GTCP660-49-3039. Document: FAA AD 75-05-17 Amendment No. 39-2357. Compliance: As detailed in the requirement document.