What was found
PILOT REPORTED STRONG FUEL ODOR IN CABIN. INVESTIGATION REVEALED FUEL LEAKING FROM FLARELESS FITTING SLEEVE AT BULKHEAD FITTING AFT OF FIREWALL BELOW THE NOSE BAGGAGE AREA FLOOR. FUEL WAS CARRIED BACK INTO THE CABIN AREA INSIDE THE PLASTIC CHAFF SLEEVE COVERING THE LINE. THE PLASTIC CHAFF COVER WAS SPLIT IN THE CABIN AREA AND FUEL DRIPPED BEHIND THE SIDE PANEL. REPLACED LINE ASSEMBLY. SUSPECT FLARELESS FITTING SLEEVE BECAME LOOSE DUE TO VIBRATION AND AGE.