COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 340 Series Aeroplanes AD/CESSNA 340/17 Auto Pilot System - Disabling - Modification 6/78 Applicability: Model 340A S/Nos. 340A0001 to 340A0458, 340A0460 to 340A0466, 340A0468 and 340A0470 to 340A0483; 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 autopilot by pulling and banding AUTO PILOT COMPUTER (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 autopilot.