As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF FROM SEA, THE A/C HAD A SLIGHT ROLLING MOTION TO THE RT. THE CONTROLS FELT HARD TURNING TO THE LT. THE AIRCRAFT RETURNED TO FIELD. MAINTENANCE INSPECTED THE AIRCRAFT AND REPLACED THE RT AILERON TRIM TAB SPRINGS AND THE AILERON TRIM ACTUATOR. OPERATIONAL CHECKS AND A CHECK FLIGHT WERE PERFORMED AND WERE GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.