As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING TAKEOFF, THE PILOT NOTICED NR 2 ENGINE OVERTORQUE WITH RPM FLUCTUATION BETWEEN 900-1200. THE POWER LEVER WAS RETARDED ALMOST IMMEDIATELY. THE PROPELLER RPM KEPT FLUCTUATING AND DECISION WAS MADE TO CONDUCT A SHUTDOWN. AN UNEVENTFUL LANDING WAS CONDUCTED. TROUBLESHOOTING IS ONGOING.