As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT THEY RECEIVED A RIGHT-ENGINE FIRE WARNING MESSAGE IN FLIGHT. THE CREW DECLARED AN EMERGENCY. THE AIRCRAFT LANDED AT ITS INTENDED DESTINATION WITHOUT FURTHER INCIDENT. MAINTENANCE REPORTED NO EVIDENCE OF FIRE FROM THE ENGINE. MAINTENANCE REPLACED THE FIRE DETECTOR CONTROLLER UNIT. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED. FURTHER, AN OPERATIONAL CHECK FLIGHT WAS PERFORMED WITH NO FURTHER ISSUES.