As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE TROUBLESHOOTING, AN UNCOMMANDED TORQUE OSCILLATION IN FLIGHT WHICH WAS DISCOVERED TO BE A TURBINE PROBLEM, THE ANOMALY WITH THE RECENTLY REPLACED GOVERNOR WAS DISCOVERED. THE SHAFT/POINTER ON THE GOVERNOR WAS FOUND SEIZED. WITH AN ABNORMAL AMOUNT OF FORCE IT COULD BE MOVED. THIS GOVERNOR WAS REPLACED LESS THAN 12.4 HOURS AGO OUT OF O/H.