As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED AILERON TRIM UNCOMMANDED MOVEMENT AND THE AILERON TRIM KNOB INOPERATIVE. THEY ADVISED THE AILERON TRIM ROLLED BACK & FORTH UNCOMMANDED WITH THE AUTOPILOT OFF DURING PREFLIGHT. MAINTENANCE INSPECTED AND FOUND CHAFFED WIRES AT THE AILERON, REPAIRED WIRING WITH NO FURTHER DEFECTS NOTED.