As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) #2 ENGINE HAD A FIRE WARNING INDICATION IN FLIGHT. #2 ENGINE WAS SHUTDOWN AND FIRE WARNING WENT OUT, SO FIRE BOTTLES WERE NOT ACTIVATED. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE COULD NOT DUPLICATE FAULT ON THE GROUND. ALL SYSTEMS CHECKED NORMAL. PRECAUTIONARY REPLACEMENT OF THE FIRE DETECTOR CONTROL UNIT WAS CARRIED OUT FOR TROUBLESHOOTING OF THE INTEGRAL K2 RELAY.