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-1/1A Control Cables and Pulleys - Inspection NK Applicability: All models. Requirement: Thoroughly clean and inspect all rudder, aileron and elevator control pulleys and cables where the cables pass under the pulley grouping forward of the wing centre spar. Note: To adequately inspect the cable it will be necessary to actuate the controls to the full deflection to expose the complete cable pulley contact area for examination. Compliance: Within 100 hours' time in service after 25 February 1972 and thereafter at intervals not exceeding 100 hours' time in service.