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 121/15 Flap Actuating Lever Assemblies 4/75 Applicability: All series 1, 2 and 3 aeroplanes. Requirement: Action in accordance with Scottish Aviation SB No. B121/61. Compliance: Within 25 hours time in service after 19 May 1975 and thereafter at intervals not exceeding 100 hours time in service.