What was found
NOXIOUS FUEL ODOR IN THE COCKPIT, DONNED O2 MASKS. RAN LT AND RT PACKS OFF OF APU BLEED AND ENGINE BLEEDS. CONFIRMED AN ODOR WITH APU AND ENGINE BLEEDS. NO ODOR NOTICED IN CABIN. INSPECTED APU, FOUND NO SIGNS OF SMOKE OR OIL LEAKS. APU OIL LEVEL WAS GOOD. REPLACED APU FUEL SOLENOID SHUTOFF VALVE AND LT PACK WATER SEPERATOR COALESCER IAW AMM. PERFORMED OPS CHECK OF LT PACK WITH ENGINE BLEED IN HOT AND COLD AND APU BLEED IN HOT AND COLD NO ODOR NOTED AT THIS TIME. OPS CHECK GOOD AT THIS TIME.