What was found
BIL - DURING DESCENT INTO BIL, THE PILOT SELECTED THE LEFT BLEED TO ENVIRO, AND SMELLED FUEL VAPOR IN THE COCKPIT. FUEL LEAK AT THE LEFT ENGINE FLOW DIVIDER, AND DUMP VALVE. LEAK CHECKED ENGINE, FOUND FUEL LEAK AT THE FUEL PRESSURE SIDE OF THE DUMP VALVE, DISASSEMBLED, AND REPLACED THE O-RINGS, AND BACK UP RINGS. THE ENGINE WAS RUN AND LEAK CHECKED WITH NO LEAKS NOTED. (M)