COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Gulfstream (Grumman) G1159 and G-IV Series Aeroplanes AD/G1159/31 Amdt 1 Elevator Trim Tab Outboard Hinge Fittings - Inspection 7/82 Applicability: All model GII and GIIB aircraft. Document: Grumman Customer Bulletin No. 325 Amendment 1. (FAA AD 82-11-02 Amdt. 39- 4384 refers). Compliance: 1. Unless already accomplished, before further flight after 31 July 1982 - as detailed in the requirement document. 2. Repeat inspection as detailed in the requirement document until repair or replacement as detailed in the Aircraft Service Change No. 315. Background: Manufacturer reports trim tab hinge fitting cracks have occurred. Amendment 1 raised to cover increases in applicability and revisions to repeat inspection, repair or replacement requirements.