COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 76 (Duchess) Series Aeroplanes AD/BEECH 76/5 Main Landing Gear Fork Pin 8/79 Applicability: All model 76 with S/Nos. ME-1 to ME-228. Requirement: Action in accordance with Beechcraft SI No. 1073. Compliance: Within 50 hours' time in service, unless already accomplished, after 28 August 1979. Background: Failure of the existing fork pin retaining pin could result in separation of the wheel and fork assembly.