As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN-ROUTE, THE PILOT REPORTED THAT THE RT ENG TORQUE STARTED TO DROP OFF. THE PILOT WAS ABLE TO MATCH TOQUE BY ADVANCING THE RT POWER LEVER. DURING APPROACH, THE RT ENG BEGAN TO SURGE. THE PILOT PERFORMED A PRECAUTIONARY IN FLIGHT SHUTDOWN OF THE RT ENG. DECLARED AN EMER & LANDED WITHOUT INCIDENT. FOUND THE RT ENG FUEL CONTROL UNIT DEFECTIVE. R & R THE RT ENG FUEL CONTROL UNIT. THE RT ENG GND RUNS WERE COMPLETED & FOUND SATISFACTORY.