As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONT - FLIGHT 4099 - ON TAKEOFF ROLL, AND ON CLIMBOUT, THE RUDDER TRIM WAS OBSERVED TO MOVE APPROXIMATELY 25 PERCENT LEFT DEFLECTION. ON BOTH OCCASIONS, IT DID NOT APPEAR THAT THE RUDDER ACTUALLY MOVED. ALL MOVEMENT INDICATIONS WERE UNCOMMANDED WITH THE AUTO PILOT OFF. MAINTENANCE INSPECTED THE AIRCRAFT AND THEN CYCLED THE SHIPS POWER. OPERATIONAL CHECKS OF THE RUDDER TRIM SYSTEM WERE GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.