As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YIP - FLT 18779 - DURING DESCENT INTO YIP, THE RUDDER TRIM RAN AWAY FULL RIGHT AND CIRCUIT BREAKER TRIPPED. THE AIRCRAFT CONTINUED ON TO LANDING AT ITS INTENDED DESINATION AT YIP. CORRECTIVE ACTION: COULD NOT DUPLICATE. OPS CHECKED RUDDER TRIM SYSTEM BY OPERATION OF RUDDER TRIM SWITCH THROUGH ITS ENTIRE TRAVEL RANGE. OPS CHECKED NORMAL. NO DEFECTS NOTED. THE AIRCRAFT RETURNED TO SERVICE. (X)