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-1/14 Rudder Control Bars - Inspection 2/75 Applicability: All models. Requirement: To confirm that rudder control bars P/N 601031-501 are correctly welded inspect visually as follows: 1. View both rudder control bars located inside the lower forward fuselage. 2. Inspect weld joints at junction of rudder cable attach arm and rudder control bar. Each joint must have a weld bead at four locations i.e. fore and aft bottom and fore and aft top. 3. Inspect weld joints at junction of rudder pedal tees and rudder control bar. Each joint must have a weld bead at four locations i.e. fore and aft bottom and fore and aft top. 4. If inspection reveals missing welds, replacement or repairs to an approved scheme must be incorporated before further flight. Compliance: Before further flight after 21 February 1975.