As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAW CREW, WITH CTR TANK FUEL AND MAIN TANKS EQUAL AT 61.6 ON DEPARTURE,THE LT MAIN TANK FUEL QTY INCREASED TO 64.9 WITH THE RT STILL AT 61.6. FUEL FLOW WAS EVEN FOR ENG 1 AND 2. WITH CTR TANK FUEL USED AND TANK TO ENGINE FUEL FLOW NORMAL AND FUEL BALANCE MAINTAINED. REPLACED LT MAIN FWD AND AFT BOOST PUMP DISCHARGE CHECK VALVES IAW MM. OPS CHECKS GOOD.