COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beagle B121 (Pup) Series Aeroplanes AD/BEA 121/18 Rudder Control Lever 10/77 Applicability: All models B121 with Rudder Control Lever P/N BE 45.10193. Requirement: Action in accordance with Scottish Aviation SB No. B121/72. Compliance: Within 100 hours time in service after 31 October 1977.