As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DUE TO PREVIOUS IMPULSE COUPLING FAILURES, THE MAGNETO IMPULSE COUPLING IS INSPECTED EVERY 100 HOURS OF OPERATION.THIS MAGNETO WAS REMOVED FOR A 500 HOUR INSPECTION AND THE HUB WAS FOUND TO BE VERY LOOSE.THIS COUPLING HAD ONLY 93.1 HOURS TSN.