As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN'S AND F/O'S YOKE TRIM SWITCHES FAIL TO MOVE TRIM WHEEL. TRIM FAIL APPEARS ON MAP AFTER THE YOKE TRIM SWITCHES ARE PUSHED. ALSO, TRIM ILLUMINATES ON AUTOPILOT PANEL. REPLACED ELEVATOR TRIM SERVO. OPS CHECK GOOD. UPDATE 5/24/03 FAILURE REPEATED. REPLACED TRIM SERVO RELAY K0463. BOTH AUTOPILOT TRIM SWITCHES OPS CHECK GOOD IAW MM 22-10-00. P/N M83536/6-022M.