As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MOMENTARY APPLICATION OF RIGHT RUDDER TRIM RESULTED IN TRIM RUNNING AWAY FULL RIGHT. UNABLE TO GET ANY FURTHER TRIM MOVEMENT. REMOVED AND INSTALLED NEW RUDDER TRIM ACTUATOR IAW EA500 AMM 27-23-16. RIGGED AND OP'S CHECKED RUDDER IAW EA500 AMM 27-00-01 AND 27-00-00. NO DEFECTS NOTED.