As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON TAKEOFF THE PILOT HEARD A LOUD BANG FOLLOWED BY A LEFT YAW OF THE AIRCRAFT. THE PILOT IMMEDIATELY PERFORMED A PRECAUTIONARY LANDING AND SHUT DOWN THE AIRCRAFT DOWN. ON SHUTDOWN A GRINDING NOISE WAS HEARD FROM THE SPRAG CLUTCH AREA. AN ENGINEER WAS DISPATCHED AND HE CONFIRMED THAT THE SPRAG CLUTCH WAS MAKING GRINDING NOISES. IT WAS STILL FUNCTIONING WHEN THE AIRCRAFT WAS INSPECTED.