COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Gulfstream (Grumman American/ American Aviation) AA-1 Series Aeroplanes AD/AA-1/7 Elevator Bungee Housing Assembly - Inspection NK Applicability: All models. Document: American Aviation SL No. 71-11A. Compliance: Within 100 hours' time in service after 30 June 1972 and thereafter at intervals not exceeding 100 hours' time in service.