As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING DESCENT, ENGINE POWER COULD NOT BE REDUCED BELOW 1000 LBS TORQUE. THE AIRCRAFT DIVERTED TO BASE AND THE PILOT SHUT THE ENGINE DOWN IN FLIGHT AND ACCOMPLISHED A SINGLE ENGINE LANDING. SUBSEQUENT INSPECTION DETERMINED A DEFECTIVE OVERSPEED GOVERNOR AS THE SOURCE OF THE PROBLEM.