COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 33 and 35-33 (Debonair/Bonanza) Series Aeroplanes AD/BEECH 33/33 Seat Recline Actuators 12/87 Applicability: All models with S/Nos listed in the Requirement document which are equipped with Hydrolock seat recline actuators on copilot, 3rd and 4th seats. Requirement: Action in accordance with Beechcraft SB No 2175 R1. Note: FAA AD 87-18-06 refers. Compliance: Within 100 hrs time in service after 3 December 1987 or at the next scheduled inspection for Maintenance Release issue, whichever is later. Background: The manufacturer reports instances of inadvertent actuation of the seat mechanism which in some phases of flight operation could be a hazard.