A pilot reports “...that the controls were stiff in the roll axis. (While in flight...) the autopilot was turned off and the circuit breaker cycled with no change in the condition. After landing at Spokane without incident, technicians arrived and trouble-shot the autopilot system. They discovered the aileron autopilot servo drive clutch (P/N 4006719-906) was not fully disengaging, causing the excessive force required to roll the aircraft. The aileron autopilot servo drive was removed and replaced. Both ground and in flight operational checks were performed and no defects noted.”

(Time since overhaul given as 147.3 hours.)

Part Total Time: unknown.