As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, CREW TURNED ON AIRCRAFT HEATER, CABIN FILLED WITH FUEL ODOR. CREW TURNED OFF HEATER, VENTED CABIN AND RETURNED TO BASE. MAINTENANCE FOUND HEATER FUEL PUMP PARTING HALVES LOOSE. RE-TORQUED HARDWARE AND RE-INSTALLED PUMP HOUSING COVER. RETURNED AIRCRAFT TO SERVICE.