As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, PUT IN ABOUT 3 DEGREES RT TRIM, AT 1500 FT NOTICED TRIM WAS FROZEN AT 3 DEGREES. PERFORMED OPS TEST OF RUDDER AND RUDDER TRIM CONTROL SYS IAW AMM 27-21-00-715-001-001. NO DEFECT NOTED, OP'S CHECK OK ON GROUND. AS PRECAUTIONARY REPLACE AILERON/RUDDER TRIM PANEL. REMOVED AND REPLACED AILERON/RUDDER TRIM PANEL PER AMM 27-21-23. OPS CHECK GOOD. OK FOR SERVICE.