As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT NOTICED THAT THE RUDDER TRIM SYSTEM WAS UNRESPONSIVE WHEN RUDDER TRIM ADJUSTMENT WAS MADE. UPON CLOSER EXAMINATION THE ARM THAT CONNECTS TO THE RUDDER TRIM ACTUATOR ON THE RUDDER CONTROL ARM ASSY (PN 63457-003) HAD SEPARATED FROM THE TUBE ADJACENT TO THE WELD.