As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREWS REPORT THAT DURING CRUISE, THE MAIN ELECTRIC STABILIZER TRIM WOULD NOT TRIM NOSE DOWN. CREW THEN DEACTIVATED THE MAIN TRIM SYSTEM AND ENGAGED STANDBY TRIM SYSTEM. STANDBY SYSTEM FUNCTIONED NORMAL. AIRCRAFT CONTINUED AND LANDED WITH NO FURTHER FAULTS. MAINTENANCE T/S FOUND REALLY P/N A410-1545654-00 INTERMITTENT. REPLACED.