COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Gulfstream (Grumman American) GA-7 Series Aeroplanes AD/GA-7/8 Rudder Bellcrank - Inspection and Modification NK Applicability: All models GA-7 with S/Nos. GA7-0002 to GA7-0093, GA7- 0096 to GA7-0099, and any model GA-7 which may have been fitted with rudder bellcrank assembly P/N 7CS10534-3 shipped from Grumman American Savannah, Georgia facility prior to 12 April 1979. Document: Grumman American SB No. ME-19. Compliance: 1. Inspect within 25 hours time in service after 4 July 1979. 2. Modify within 100 hours time in service after 4 July 1979. Background: The rudder bellcrank may crack due to loads induced by wind gusts while aeroplane is parked.