As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONE HOUR INTO FLIGHT-LEVEL 330 AFT CARGO FIRE DETECTION ACTIVATE DFDR APPROX 5 SEC THEN SHUTOFF. RAN EMERGENCY CHECKLIST PROCEDURE. HALF WAY THOUGH CHECKLIST CARGO FIRE DETECTION ACTIVATED FOR 2ND TIME. EXTINGUISHED BOTTLE NR 1 INTO CARGO HOLD PER CHECKLIST AND DIVERTED TO IAH OVERWEIGHT LANDING MADE AT IAH. REPLACED AFT NR 1 AND NR 5 CARGO FIRE DETECTORS. REPLACED FIRE DEPLETED FIRE BOTTLE. OVERWEIGHT LANDING INSPECTION MADE.