As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE FIRE WARNING LIGHT ILLUMINATED DURING CRUISE FLIGHT FOR 15 SECONDS BEFORE THE FIRE WARNING LIGHT EXTINGUISHED UNCOMMANDED. THE SYSTEM WAS INSPECTED AND A FUNCTIONAL TEST WAS PERFORMED WITH NO DEFECTS NOTED. THE DISCREPANCY COULD NOT BE DUPLICATED.