As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DECLARED EMERGENCY, AFT CARGO COMPT FIRE WARNING LIGHT ILLUMINATED AND FIRE BOTTLE WAS DISCHARGED. AFTER LANDING NO SIGN OF SMOKE OR FIRE FOUND. DEFERRED CARGO FIRE SYS AND INOP BOTH CARGO COMPTS PER MEL. LATER ON DURING RON REMOVED AND REPLACED BOTH FIRE BOTTLES. REMOVED AND REPLACED DIVERTED VALVE. REMOVED AND REPLACED OVERHEAD CARGO FIRE PANEL, AND REMOVED AND REPLACED CCU'S MODULE PER MM. AFTER DOWN LOADING CCU FOUND 3 EA AFT CARGO COMPT FIRE DETECTORS FAULTY. REMOVED AND REPLACED SAME PER MM. OPS CK GOOD.