As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL400 THE PITCH TRIM ANNUNCIATOR ILLUMINATED WITH AUTOPILOT ON. THE PITCH TRIM WHEEL WAS FROZEN IN PLACE AND REMAINED THAT WAY UNTIL ABOUT 6,000 FT. EMERGENCY DECLARED, DIVERTED TO STL AND LANDING WAS UNEVENTFUL. MAINTENANCE LUBED LEFT AND RIGHT ELEVATOR PITCH TRIM ACTUATORS. OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO DEFECTS NOTED. AIRCRAFT WAS RELEASED FOR OPERATIONAL CHECK FLIGHT.