As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ENGINE START, AN INDUCTION FIRE STARTED WHEN THE CARBURETOR BACKFIRED. THE FIRE COULD NOT BE EXTINGUISHED AND DESTROYED THE AIRCRAFT. DURING AN INVESTIGATION THE GASCOLATOR COVER WAS FOUND CRACKED. IT APPEARS THE FUEL LEAKING FROM THE COVER APPEARS TO HAVE FED THE FIRE THAT DESTROYED THE AIRCRAFT.