As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE NR 4 ENGINE OIL FILTER BYPASS LIGHT ILLUMINATED. PER THE COM THE ENGINE WAS OPERATED AT REDUCED THRUST. THE ENGINE SUBSEQUENTLY EXPERIENCED A FLAME-OUT. A RESTART ATTEMPT WAS UNSUCCESSFUL. THE FLIGHT CONTINUED TO NRT AND LANDED WITHOUT FURTHER INCIDENT. THE NR 4 ENGINE WAS REPLACED.