As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, FUEL STARTED VENTING FROM THE RIGHT WING TIP. AIRCRAFT RETURNED TO NRT AND LANDED WITHOUT INCIDENT. CORRECTED SURGE TANK VENT LINE LEAK AT OUTBOARD NACELLE RIB COUPLING AND REPLACED THE NBR 3 FORWARD AND AFT MAIN BOOST PUMP DISCHARGE CHECK VALVES AND BOOST PUMP BYPASS CHECK VALVE.