As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL TRANSFER PROBLEM FROM CENTER TO THE RIGHT TANK. WITH CENTER TANK FEEDING ENGINES, THE CENTER TANK PUMPED ENOUGH FUEL INTO THE RIGHT TANK TO CAUSE RIGHT FUEL TANK TO OVER FILL AND CAUSE FUEL, APPROX 3000FT TO DUMP OVERBOARD THRU FUEL VENT. REPLACED RT FWD BOOST PUMP DISCHARGE CHECK VALVE, FUEL QTY PROCESSOR & FUEL CONTROL UNIT. OPS NORMAL.