What was found
FUEL IMBALANCE, LEFT FUEL INDICATION INCREASE SLOWLY. TEST FUEL QUANTITY INDICATION SYSTEM PER AMM. NO FUEL QTY STATUS MESSAGE, NO TANK UNITS & DENSITOMETERS FAULTS IN HISTORY. CONFIRMED SLOW RATE SUGGEST REMOVING LT PUMPS FOR INSPECTION AND POSSIBLE TANK ENTRY FOR INPECTION OF DISCHARGE CK VALVES & PICK UP LINES. REPLACED LT FWD BOOST PUMP. FOUND LT FWD BOOST PUMP WITH CENTER O-RING CUT. CHECKED ALL FUEL QUANTITY ONBOARD INFO. ACFT HAD NO FUEL QUANTITY SYSTEM ISSUE TO REPORT.