As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN THE MAGNETO WAS DISASSEMBLED, NOTED THE BEARING CAP ASSEMBLY HAD WORN ENOUGH TO BECOME A LOOSE FIT IN THE MAGNETO HOUSING RESULTING IN CONTACT BETWEEN THE ROTOR AND POLE SHOES DURING OPERATION. THE BEARING CAP ASSEMBLY RETAINING HARDWARE WAS STILL IN A TORQUED CONDITION.