COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 310 Series Aeroplanes AD/CESSNA 310/49 Auto Pilot System - Disabling and Modification 6/78 Applicability: Models 310R, T310R, S/Nos. 310R0501 to 310R1302, 310R1304 to 310R1315, 310R1317 and 310R1318 incorporating ARC Model 400B auto pilot installations. Requirement: 1. On aircraft not modified in accordance with Cessna SL No. AV78 -6 dated 31 March 1978 or later revision, disable the model 400B auto pilot by pulling and banding AUTO PILOT (COMP) and ACTUATOR (ACT) circuit breakers. 2. Install a placard in plain view of the pilot indicating "AUTO PILOT INOPERATIVE". 3. Upon accomplishment of the electrical auto pilot actuator modification set out in Cessna SL No. AV78-6, the auto pilot may be returned to service and the "AUTO PILOT INOPERATIVE" placard removed. Compliance: Paras. 1 and 2 - Before further flight. Para. 3 - Before further flight using auto pilot.