As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE THE RT PROPELLER RPM STARTED TO DROP AND TORQUE WENT UP. THIS STARTED TO FLUCTUATE UP AND DOWN. THE CREW FEATHERED THE PROPELLER AND SHUTDOWN THE ENGINE. THEY DIVERTED E THEY LANDED WITH NO ISSUES. AFTER INSPECTION THE PROP GOVERNOR WAS FOUND TO BE THE ISSUE IT WAS REPLACED WITH A OVERHAULED UNIT. SATISFACTORY OPS TESTS WERE CARRIED OUT AND THE ACFT IS BACK IN SERVICE.