As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TRANSITION TO DESCENT, NR 3 THROTTLE WOULD NOT RETARD FULLY. THE CREW ELECTED TO CARRY OUT A PRECAUTIONARY SHUTDOWN OF NR 3 ENGINE. A NORMAL LANDING WAS COMPLETED. MAINTENANCE WAS UNABLE TO DETECT A FAULT DURING POST FLIGHT ASSESSMENT.