As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 9405 DSM TO ATL ON FINAL APPROACH THE CREW EXPERIENCED AN UN-COMMANDED MAXIMUM THRUST ON ENGINE NR 1 LASTING FOR APPROXIMATELY 5 TO 10 SECONDS AND THEN THE THRUST ON THE ENGINE RETURNED TO NORMAL. THE CREW DISENGAGED THE AUTO THROTTLES AND CONTINUED THE APPROACH AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE CLEANED CONNECTOR PINS TO THE FMU.