As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A BASE INSP, IT WAS DISCOVERED THAT THE RUDDER TRIM WHEEL WAS EXTREMELY DIFFICULT TO OPERATE. ON EXAMINATION, IT WAS FOUND THAT 1 OF THE ACTUATOR SCREWS SEEMS TO HAVE JUMPED A THREAD. THE TRIM ACTUATOR WAS REPLACED WITH A NEW PN 55654-102.