As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING REFUELING, THE RIGHT HAND SURGE TANK STARTED VENTING FUEL. - FOUND NUMBER 4 MAIN TANK REFUEL VALVE STICKING IN THE PARTIALLY OPEN POSITION. EXERCISED THE VALVE MANUALLY AND SYSTEM OPERATIONAL CHECK WAS NORMAL IN ACCORDANCE WITH B747-400 AIRCRAFT MAINTENANCE MANUAL 28-21-00.