As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEVATOR TRIM FAILED. THE MANUAL HORIZONTAL STABILIZER TRIM SYSTEM WAS INNOPERATIVE DUE A BROKEN LINK IN THE STABILIZER TRIM MECHANISM CHAIN ASSEMBLY. THIS ALLOWED THE CHAIN TO COME APPART AND PREVENT CREW MANUAL INPUTS FROM THE FLIGHT DECK. THE CHAIN ASSEMBLY HAS BEEN REPLACED, ALL OTHER PARTS OF THE TRIM SYSTEM HAVE BEEN INSPECTED, THE AIRCRAFT HAS BEEN TEST FLOWN AND IS BACK IN SERVICE.