As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 2958 AT APPROXIMATELY 1000 FEET DURING THE FINAL APPROACH WITHOUT THE AUTO PILOT ON THE CREW PUT THE LANDING GEAR DOWN AND THE PITCH TRIM STARTED TO RUN THE NOSE DOWN BY ITSELF. THE CREW PUSHED AND HELD THE INHIBIT BUTTON AND THE TRIM STOPPED AT 2 PERCENT DOWN. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE HORIZONTAL STABILIZER CONTROL UNIT. THE AIRCRAFT WAS RETURNED TO SERVICE.