As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE WOULD NOT DECELERATE BELOW 69 PERCENT N1 ON DESCENT. CREW TURNED OFF BOTH ELECTRONIC ENGINE CONTROLS AND POWER SURGED TO 79 PERCENT N1. LANDED MIA WITHOUT INCIDENT. REPLACED MAIN ENGINE FUEL CONTROL FOR NUMBER ONE ENGINE. SYSTEM GROUND CHECKED NORMAL OPERATION.