As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEATER VENTING FUEL OVERBOARD FROM COMBUSTION CHAMBER DRAIN CAUSING FLAME STREAK THE LENGTH OF THE LOWER FUSELAGE. FUEL DRAIN IS LOCATED IN LINE AND 3 INCHES AHEAD OF HEATER EXHAUST. RECOMMEND AIR CREWS LOOK FOR THIS CONDITION DURING PRE-FLIGHT.