As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - ON CLIMB GOT LEFT HAND ENGINE LOOP-A FIRE DETECTION AND AFT CARGO FIRE WARNING. DISCHARGED AFT CARGO BOTTLE. RETURNED TO MIA AND LANDED WITHOUT INCIDENT. FOUND NO EVIDENCE OF FIRE. REPLACED NUMBER ONE AND TWO FLIGHT WARNING COMPUTERS AND CARGO SMOKE DETECTION CONTROL UNIT. SYSTEM GROUND CHECKED NORMAL OPERATION.