As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNWANTED FUEL TRANSFER FROM THE CENTER TANK TO THE LEFT, LEFT TANK INCREASES WITH THE CTR PUMPS ON. WHEN CENTER PUMPS OFF THE LEFT TANK QTY DECREASES AND THE CENTER TANK INCREASES. IAW FIM28-220-00-810-849: REPLACED LT TANK OUTLET FLOAT OPERATED SOV IAW AMM28-22-11. ACCOMPLISHED FUEL SCAVENGE FUNCTIONAL TEST PER MM28-22-00-720-802. AIRCRAFT PASSES ALL TESTS. FUEL SYSTEM OPERATES NORMAL. RETESTED PUMPS IN NORMAL CONFIGURATION. ALL OPS NORMAL.