As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ENROUTE, AT FLIGHT LEVEL 390 FLIGHT CREW OBSERVED A FIRE INDICATION ON THE NR 2 ENGINE. THE FLIGHT CREW WAS ABLE TO EXTINGUISH THE FIRE INDICATION LIGHT USING STANDARD EMERGENCY PROCEDURES. THE FLIGHT CREW THEN DECLARED AN EMERGENCY AND RETURNED WITH NO FURTHER INCIDENT.