As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOPILOT TRANSFER SWITCH WILL NOT TRANSFER FROM FIRST OFFICER SIDE. WHEN AUTOPILOT IS ENGAGED, TRIM WHEEL RAPIDLY TRIMS NOSE UP. INSPECTED AND REPLACED LAMPS AND F/O''S TRANSFER SWITCH. FOUND LOOSE SCREW INSIDE. REPAIRED, OPS CHECKS GOOD. AUTOPILOT TESTS GOOD.