As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AT CRUISE ALTITUDE, DURING DESCENT, CREW WERE UNABLE TO RETARD POWER ON THE LT ENGINE THROTTLE. A FEW ATTEMPTS TO REDUCE POWER WERE MADE WITH NO CHANGE. THE CREW MANUALLY SHUTDOWN THE ENGINE AND MADE AN UNEVENTFUL LANDING. SUBSEQUENT TROUBLESHOOTING TRACED THE PROBLEM TO THE FUEL CONTROL UNIT. THE FCU WAS REPLACED AND THE A/C RETURNED TO SERVICE.