COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Gulfstream (Grumman American/ American Aviation) AA-5 Series Aeroplanes AD/AA-5/13 Upper Cowl Centre Hinge - Inspection NK and Replacement Applicability: All models: AA5 with S/Nos. AA5-0641 to AA5-0834; AA5A with S/Nos. AA5A- 0001 to AA5A-0050, AA5A-0054 to AA5A-0056; AA5B with S/Nos. AA5B-0001 to AA5B-0169, AA5B-0171 and AA5B-0180 to AA5B-0183. Document: 1. Grumman American SB No. 152; OR 2. FAA AD 76-01-02. Compliance: Inspect within 100 hours' time in service after 16 April 1976 and thereafter at intervals not exceeding 100 hours' time in service until replaced.