As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RUDDER TRIM RUNAWAY. HAD TO USE RIGHT MANUAL RUDDER PEDAL INPUT FROM FROM 35,000 FEET UNTIL LANDING. TROUBLESHOT SYSTEM TO A DEFECTIVE AILERON/RUDDER TRIM CONTROL PANEL. REMOVED DEFECTIVE TRIM CONTROL PANEL AND INSTALLED A NEW TRIM CONTROL PANEL IAW AMM 27-12-04. OPS TESTED GOOD.