As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI, PILOT TURNED ON CABIN HEATER. WHEN NO HEAT APPEARED PRESENT, PILOT TURNED OFF HEATER. AT THIS POINT A SMALL FIRE IGNITED IN THE HEATER BAY. PILOT SECURED THE AIRCRAFT AND EXITED THE AIRCRAFT. THE FIRE WAS EXTINGUISHED WITH MINIMAL DAMAGE TO THE AIRCRAFT. MAINTENANCE LATER FOUND THE HEATER FUEL SUPPLY LINE FRACTURED.