As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED LEFT HAND MAGNETO FAILED. REMOVED MAG, FOUND BOTH LEFT HAND S/N A-145-9506 AND RIGHT HAND S/N M-145-9505 IGNITION COILS P/N 10-382588-1 CRACKED. CRACKS ORIGINATE ON BOTH COILS AT IRON CORE AND EXTEND OUTWARD. ON LEFT HAND COIL, CRACK ALSO PRESENT AT SURFACE FACING ROTATING MAGNET. SUBMITTED MAGNETO TO MFG FOR EVALUATION FOR POSSIBLE DEFECTS IN COILS PRODUCED DURING THIS PERIOD OF TIME.