What was found
CRG FIRE LWR AFT ALERT ON DESCENT. CREW FIRED 1 BOTTLE AND DECLARED EMERGENCY, NO EVIDENCE OF ANY FIRE IN AFT OR CENTER CARGO COMPART OR CONTAINERS AS THEY WERE OFF LOADED. REMOVED AND REPLACED LWR FWD CARGO FIRE EXT IAW M/M 26-22-01-4. REMOVED AND REPLACED MSC IAW M/M 31-12-01-4, OPS CHECK NORMAL. INSPECTED WIRING IN AFT LWR CARGO PER REF TO MD-10 FIM 26-14-02, NO DEFECTS NOTED AT THIS TIME. REMOVED AND REPLACED BOTH SMOKE DET IN CENTER CARGO COMP AND BOTH DET IN AFT CARGO COMP PER MM 26-14-01-4 AND PERFORMED ADJ/TEST OF LOWER CARGO COMP FIRE/SMOKE DETECTION SYSTEM PER MM 26-14-01-5. NO DEFECTS NOTED. OK FOR SERVICE.