What was found
CREW REPORTED FUEL IMBALANCE, INCORRECT TOTALIZER & FMC CALCULATED TO CONTINUE TO LHR. KICKED OFF A-P & ACFT LT WING HEAVY. MX REPLACED FUEL QTY PROCESSING UNIT. FAULT REPEATED INBOUND. FUEL TANK PROBES R13 & R14 REPLACED. NO FURTHER FUEL IMBALANCE OR INDICATION PROBLEMS NOTED. PRIOR, ACFT PROBLEM WITH RT TANK UNDERWING FUEL GAUGE INOP & REFUELING VALVE NOT OPENING. REPLACEMENT OF FQPU & FUEL TANK PROBES R13 & R14 AS A RESULT OF THIS EVENT DID NOT CORRECT THIS PROBLEM. THE PROBLEM WAS FINALLY CORRECTED WHEN THE INTEGRATED REFUEL PANEL REPLACED ON 8/30/05. NO FAULTS FOUND ON REPLACED FQPU & FUEL TANK PROBES R13 & R14. REPLACED IRP FAILED TEST AT VENDOR & REPAIRED.