As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATL - INFLIGHT MSP-MIA. CREW REPORTED NUMBER ONE ENGINE B-LOOP FAULT OVERHEAT LIGHT ILLUMINATED INTERMITTENTLY. FLIGHT RETURNED ATL LANDED WITHOUT INCIDENT. REPLACED FIRE WARNING MODULE THAT HAD FAULTED. SYSTEM GROUND CHECKED NORMAL OPERATION.