As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SHORTLY AFTER LEVELING OFF IN CRUISE THE RT ENG FIRE WARNING LIGHT ILLUMINATED. CREW INITIATED A TURN AWAY FROM THE SUN TO CONFIRM LIGHT WHICH DID NOT EXTINGUISH. ENG WAS SHUTDOWN AND FIRE BOTTLE DISCHARGED. ACFT RETURNED TO DEPARTURE POINT AND LANDED WITH NO FURTHER PROBLEMS. FIRE WARNING TEST ON GROUND INDICATED A FAULTY DETECTOR WHICH WAS REPLACED WITH NEW.