As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CREW REPORTED TORQUE FLUCTUATIONS, GROUND RUN CONFIRMED TORQUE FLUCTUATIONS ALONG WITH FUEL FLOW, PROPELLER SPEED AND ENGINE RPM FLUCTUATIONS. OIL PRESSURE AND TEMPERATURES WERE NORMAL. THE FCU WAS REMOVED TO INSPECT FCU DRIVE AND THE NG FLYWEIGHT BEARINGS HAD FAILED. THE FCU AND FUEL PUMP WERE REPLACED. THE ENGINE WAS GROUND RUN SERVICEABLE.