As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED AFT CARGO FIRE INDICATION. CREW DISCHARGED FORWARD AND AFT FIRE BOTTLES. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND NO INDICATION OF FIRE. REPLACED ALL THREE AFT CARGO FIRE DETECTORS AND FORWARD AND AFT FIRE BOTTLES. SYSTEM GROUND CHECK NORMAL OPERATION.