As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND AN OIL LEAK COMING FROM THE BASE OF THE LEFT MAGNETO. REMOVED MAG TO REPLACE GASKET. FELT SOMETHING ON THE MOUNTING FLANGE OF THE MAG. FOUND A SECTION OF THE FLANGE ABOUT 1 1/4 INCH CRACKED WHERE THE HOLD DOWN CLIP CLAMPS THE MAG TO THE ENGINE CASE. A LITTLE HAND PRESSURE AND THE CRACKED SECTION CAME OFF.