What was found
UNWANTED FUEL TRANSFER INTO LEFT MAIN TANK FROM CENTER TANK. FUEL TRANSFER FROM RIGHT MAIN TANK INTO LEFT MAIN TANK ALSO WITH CROSS FEED OPEN. FOUND LEFT FWD BOOST PUMP DISCHARGE CHECK VALVE FAILED AND FOD'D OUT PUMP AND HOUSING. REPLACED LEFT MAIN TANK FWD BOOST PUMP (P/N 568-1-29115-004). REPLACED FMU (P/N 808800-1). REPLACED FUEL CONTROL SWITCH (P/N D738-01-001), REPLACED RELAYS FUEL CONT LEFT TD L K76107 AND GEN IGN L K76104. RT OUTBOARD FILL VALVE LEAKING. REPLACED PACKING IN RT OUTBOARD REFUEL CONTROL UNIT. LEAK CHECK NORMAL. REPLACED ENG NR 1 & NR 2 FUEL FILTER ELEMENTS. RAN ENGINE FOUR TIMES EACH TIME ENGINE SHUT DOWN NORMAL. VERIFICATION FLIGHT COMPLIED WITH BY FLIGHT CREW (FLT 109-23).