As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNCOMMANDED ENGINE ACCELERATION PDX FLT 7671 ON SHORT FINAL FOR RUNWAY 3 IN PDX, THE AIRCRAFT EXPERIENCED AN UNCOMMANDED ENGINE ACCELERATION. THE ENGINE WAS SHUT DOWN IN FLIGHT AND THE AIRCRAFT LANDED SUCCESSFULLY. AN EMERGENCY WAS DECLARED WITH THE TOWER ON ROLLOUT AS THE AIRCRAFT WAS DISABLED ON THE RUNWAY. ARRANGEMENTS WERE MADE WITH DISPATCH AND MAINTENANCE CONTROL TO HAVE THE A/C TOWED OFF THE RUNWAY. MAINTENANCE REPLACED THE FUEL PUMP.