As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THE AUTOPILOT DISENGAGED AND THE STICK SHAKER ACTIVATED. THE POWER LEVER WAS AT OR CLOSE TO FLIGHT IDLE. THE SHAKER CONTINUED TO ACTIVATE INTERMITTENTLY WITH PUSHER CAUTION. THE TECHNICIAN ARRIVED AND COMPLETED THE SYSTEM FUNCTIONAL CHECKS. NO FAULTS WERE NOTED AND THE PROBLEM COULD NOT BE DUPLICATED. THE AUTOPILOT FAULT CODES WERE CLEARED AND THE AIRCRAFT WAS RETURNED TO SERVICE.