As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE AT FL390, IN CODE 5 TURBULENCE, NR 2 ENGINE FLAMED OUT. DESCENDED TO FL270 AND SUCCESSFULLY RESTARTED ENGINE. FLIGHT CONTINUED TO NRT AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED TO FUEL FILTER. THE ENGINE WAS INSPECTED, TESTED AND RETURNED TO SERVICE.