As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAGNETO COULD NOT TIME TO ENG. MAGNETO REPLACED AND AND TESTED. NO DEFECT FOUND. UPON FURTHER INVESTIGATION DURING TEARDOWN, FOUND THE MAIN AND RETARD POINTS BURNED AND WORN DOWN THROWING THE TIMING OUT. THAT SORT OF POINT DAMAGE IS TYPICAL OF A CAPACITOR FAILURE, HOWEVER THE CAPACITOR TESTED FINE COLD BUT IT MAY HAVE BEEN FAILING IN OPERATION WHEN HOT.