What was found
WITH THE AUTOPILOT ON, THE ELEVATOR TRIM WORKED NORMAL. WHEN THE AUTOPILOT WAS TURNED OFF, THE ELEVATOR TRIM LOCKED INTO POSITION AND WOULD NOT MOVE. WHEN THE AUTOPILOT WS TURNED BACK ON, THE TRIM WORKED NORMAL. (X)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WITH THE AUTOPILOT ON, THE ELEVATOR TRIM WORKED NORMAL. WHEN THE AUTOPILOT WAS TURNED OFF, THE ELEVATOR TRIM LOCKED INTO POSITION AND WOULD NOT MOVE. WHEN THE AUTOPILOT WS TURNED BACK ON, THE TRIM WORKED NORMAL. (X)