As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE FROM ATL, CREW HAD RIGHT ENGINE FIRE WARNING SOUND. RIGHT ENGINE B FIRE LOOP WAS ALREADY ON MCO. CREW PULLED FIRE HANDLE AND DISCHARGED BOTH FIRE BOTTLES. FLIGHT RETURNED TO ATL AND LANDED WITHOUT FURTHER INCIDENT. ATL MTC FOUND THE CONNECTOR SHORTED FOR THE A LOOP AND THE B LOOP BAD. REPAIRED THE CONNECTOR AND REPLACED THE LOOP, ALL INDICATIONS NOW NORMAL.