COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 90 and 65-90 (King Air) Series Aeroplanes AD/BEECH 90/84 Landing Gear Motor Control Circuit Breaker 11/90 Applicability: All models as listed in the Requirement Document. Requirement: Install a circuit breaker on the landing gear motor control panel in accordance with Beechcraft Mandatory Service Bulletin 2035 Revision II. Compliance: Prior to exceeding 100 hours' time in service after 1 November 1990. Background: Compliance with this AD is required to install a circuit breaker in the landing gear motor circuit which will trip and open circuit the landing gear motor circuit before the motor is damaged. Failure to comply with this AD may result in damage to the landing gear motor in a manner which could restrict operation of the manual landing gear extension system, resulting in an inability to manually lower the landing gear.