As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AN ANNUAL INSP, THE DUAL MAGNETO WAS REMOVED TO FACILITATE REPLACEMENT OF A LEAKY MOUNTING GASKET. WHEN REMOVED IT WAS NOTICED THAT THE UPPER MOUNTING CLAMP, HAD WORN INTO THE UPPER MAG BASE FLANGE BY GREATER THAN .020". THE NUT SECURING THE MOUNTING CLAMP WAS FOUND TO BE TIGHT. THIS MAG HAD BEEN O/H 377 HOURS AGO AND WAS REMOVED FOR AN UNKNOWN REPAIR 198 HOURS AGO. THE FLANGE UNDER THE LOWER CLAMP WAS HEAVILY MARKED BUT NOT WORN TO ANY GREAT DEGREE.