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 121/2 Rudder Control Torque Tubes 8/69 Applicability: All models with S/Nos. 001 to 092. Requirement: Action in accordance with Beagle SB No. B121/8. Compliance: Within 100 hours time in service after 29 September 1969 and thereafter at intervals not exceeding 100 hours time in service.