As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW EXPERIENCED UNCOMMANDED ELECTRIC TRIM MOVEMENT INBOUND TO CNY. CREW LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE TROUBLESHOT THE SYSTEM AND FOUND CHAFED WIRES AT CONNECTOR FOR F/O'S YOKE. REMOVED AND REPLACED THE CONNECTOR AND PINS. ALL OPS CHECKS NORMAL. WORK DONE IAW BMM 27-30-09.