As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SYA - INFLIGHT DFW-NRT. CREW REPORTED AFT CARGO FIRE INDICATION. AFT CARGO FIRE BOTTLES WERE BLOWN. EMERGENCY DECLARED DIVERTED SYA LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. NO VISUAL INDICATION OF FIRE. INDICATION WENT OUT ON TAXI. FLIGHT FERRIED TO AFW FOR MAINTENANCE. REPLACED PORT ASSEMBLY AT STATION 1958 LEFT BUTTLINE. SYSTEM GROUND CHECK NORMAL OPERATION.