As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NRT TOWER OBSERVED FLUID STREAMING FROM UNDER THE RIGHT WING. NO NOTICEABLE REDUCTION IN FUEL, HYDRAULIC OR OIL QUANTITIES. (DURING MAINTENANCE WALK AROUND THE RIGHT INBOARD FUEL PRESSURE RELIEF VALVE WAS FOUND TO BE OPEN SLIGHTLY. REMOVED AND REPLACED THE FUEL PRESSURE RELIEF VALVE PER AMM 28-13-05).