As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 714, CLT-BOS: ON APPROACH TO BOS, CREW RECEIVED ENGINE 2 FIRE WARNING. THE NUMBER 2 ENGINE TURBINE OVERHEAT DETECTOR WAS ALREADY ON MEL. CREW SHUTDOWN THE NUMBER TWO ENGINE AND LANDED AT BOS WITH NO FURTHER DIFFICULTIES. MAINTENANCE REPLACED BOTH OVERHEAT SWITCHES.