As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED NO MAG DROP ON LT ENGINE. UPON INSPECTION OF MAGNETOS FOUND POINTS BROKEN. INSPECTED OTHER MAGNETOS AND FOUND ONE OTHER MAGNETO EXCESSIVELY BURNED AND DAMAGED INTERNALLY. PICTURES WERE TAKEN OF MAGNETOS IF ANY ADDITIONAL INFORMATION IS NEEDED. MAGNETOS WERE REPLACED AND AC WAS RETURNED TO SERVICE.