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-1/17 Fuel Gauges Visibility - Modification 8/78 Applicability: Models AA-1 and AA-1A, all S/Nos. Model AA-1B with S/Nos. AA-1B0001 to AA- 1B0542. Document: 1. Grumman American SL No. 75-7; or 2. FAA AD 78-13-04, Amendment 39-3247. Compliance: Within 200 hours time in service after 30 September 1978.