As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED STAB TRIM FAILURE, RUNAWAY NOSE DOWN ENROUTE TO GMU, THE ACFT LANDED SAFELY. THE STAB TRIM DOWN RELAY WAS FOUND FAULTY, R & R USING A NEW RELAY IAW WDM 27-40-00. THE SYS OPERATIONALLY TESTED GOOD IAW AMM 12-A-27-40-00-00A-903A-A.