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-7/6 Rudder Bellcrank Torque Tube - Inspection NK and Modification Applicability: All model GA-7 with S/Nos. GA7-0002 to GA-70038, GA7- 0040, GA7-0042 to GA7-0087. Document: Gulfstream American SB No. ME-16. Compliance: 1. Inspect within 10 hours time in service after 28 February 1979. 2. Modify as per requirement document. Background: Partial loss of rudder control may occur if free play in the rudder circuit exceeds 1 degree.