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-7/7 Fuel Line Chafing - Inspection NK Applicability: Model GA-7 with S/Nos. GA-7-0001 to GA-7-0076. Document: 1. GAC SB No. ME-14; or 2. FAA AD 79-05-06 amendment 39-3423. Compliance: Within 25 hours time in service after 9 April 1979. Background: The main fuel line aft of the left hand engine firewall may be chafed by the propeller control cable.