As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A FLIGHT AIRCRAFT LOST THE USE OF A MAGNETO. AFTER OPENING THE ENGINE COVER, THE TECHNICIAN NOTICED THAT THE FLANGE OF THE MAGNETO WAS HANGING. A LARGE QUANTITY OF METAL FILINGS HAS BEEN FOUND IN THE OIL FILTER. (TC# 20180808017)