As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAGNETO FAILED ON GROUND RUN UP. MAGNETO WAS REMOVED AND A REPAIRED MAGNETO INSTALLED. WHEN THE COVER WAS REMOVED THE DISTRIBUTOR BLOCK WAS FOUNDED TO HAVE A GRAY POWDER DUST ON IT. TOTAL TIME ON MAGNETO FROM NEW IS 95.0 HOURS. PART SENT IN FOR WARRANTY.