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 76/8 Rudder and Rudder Trim Tab 4/80 Applicability: All model 76 with S/Nos. ME-1 to ME-316. Requirement: Action in accordance with Beechcraft SI No. 1116. Compliance: Within 25 hours' time in service after 11 March 1980. Background: There is a possibility of water accumulating in the rudder and/or trim tab.