COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 56TC (Turbo Baron) Series Aeroplanes AD/BEECH 56/18 Flight Controls 1/79 Applicability: All model 56TC with S/Nos. TG-78 to TG-83; and all 56 series fitted with rudder and/or elevators shipped from Beech during period 1 May 1973 to 1 July 1976. Requirement: Action in accordance with Beechcraft SI No. 0629-150, Rev. 11. Compliance: Within 100 hours' time in service after 31 January 1979.