As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING OPERATION OF COMBUSTION HEATER, THE PILOT NOTED JET FUEL ODOR AND SMOKE IN CABIN. HEATER OPERATION WAS TERMINATED, CABIN WAS VENTED. EMERGENCY WAS DECLARED AND AIRCRAFT LANDED AT NEAREST AIRPORT WITHOUT INCIDENT. UPON REMOVAL, A FUEL LEAK WAS NOTED AT COMBUSTION HEAD AND FUEL SOLENOID AREA. HEATER WAS REPLACED WITH A SERVICEABLE UNIT. (K)