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-5/7 Amdt 1 Applicability: All models. Wing Structure - Service Life 9/75 Requirement: Retirement of "Service Life Limited Components" shall be carried out on or before reaching the Manufacturer's service lives stated below: Component Aircraft Model Part Number Service Life Hours Inboard Spar Assembly AA-5 & 5A AA-5B 5102310-501 12,000 5102310-502 12,000 Shoulder Bolt AA-5 & 5A AA-5B 901044-1/2 7,250 901044-2 7,250 Wing Spar Assembly AA-5 & 5A AA-5A & 5B 5201002-501 12,500 5201004-501 12,500 Wing Outboard Spar Assembly AA-5 & 5A AA-5B 5201189-501 12,500 5201189-501 12,500 Compliance: As detailed in requirement.