As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RUDDER TRIM FROZE IN FLIGHT AFTER TAKE OFF AND DURING CLIMB. RUDDER TRIM STARTED OPERATING NORMAL AFTER DESCENT. MAINTENANCE ADJUSTED THE RUDDER TRIM CABLE TENSION AND LUBED RUDDER AND STABILIZER TRIM/ACTUATOR SYSTEM. A SUCCESSFUL OPERATIONAL CHECK FLIGHT WAS PERFORMED AIRCRAFT WAS RETURNED TO SERVICE.