COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Aerospatiale (Socata) TB20 (Trinidad) Series Aeroplanes AD/TB20/6 Autopilot Pitch Servo Cable Guards 2/86 DM Applicability: All model TB20 with KAP 150/KFC 150 autopilot to STC SA 1785CE-D. Requirement: King SB KS 177/178-3 Note: FAA AD 85-25-02 also refers. Compliance: Within 10 hours time in service after 16 January 1986. Background: An installation problem has been identified which can result in jamming of primary pitch control. This condition has occurred in service.