As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKE-OFF RUDDER TRIM COULD ONLY BE MOVED TO THE RIGHT REGARDLESS OF THE TRIM SWITCH POSITION. (ENDING UP AT FULL RIGHT DEFLECTION) .AIRCRAFT HAD TO BE FLOWN MANUALLY WITH FULL LT RUDDER. AFTER CB F7 PULLED AND RESET, TRIM FUNCTION WAS BACK AGAIN. ROTARY SWITCH REPLACED. AIRCRAFT RETURNED TO SERVICE.