As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON ENGINE SHUTDOWN PILOT NOTICES OIL LEAKING. INSPECTION REVEALED MAGNETO HAD A HOLE NEAR MOUNTING FLANGE. THE MAGNETO WAS REMOVED AND FOUND THAT 1 OF THE FLYWEIGHTS HAD CRACKED BY MOUNTING PIN AND THE FLYWEIGHT HAD EXITED THE MAGNETO THROUGH THE CASE. THE MAGNETO TO ENGINE DRIVE WAS ALSO CRACKED DUE TO THE FLYWEIGHT EXITING.