As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, EN ROUTE, THE STABILIZER OUT OF TRIM LIGHT ILLUMINATED. THE AUTOPILOT WOULD NOT TRIM. FLIGHT DIVERTED AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE AUTOPILOT SERVO MOTOR. OPS CHECK AND BITE TEST NORMAL. (M)