As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) IFSD DURING TAKEOFF ROLL, THE CREW OBSERVED TORQUE FLUCTUATION AND THE ENGINE WENT TO AUTOFEATHER. AFTER TAKEOFF THE PILOT SHUT DOWN THE ENGINE AND THE AIRCRAFT RETURNED TO POINT OF ORIGIN. UNEVENTFUL SINGLE ENGINE LANDING PERFORMED. TROUBLESHOOTING REVEALED FAULTY AFU.