What was found
ON 4 MILE FINAL TO RW23L IND, REC'D LVL III "CABIN SMOKE" ALERT. DONNED O2 MASKS, CHECKED AIR SYNOPTIC, SAW ONE DETECTOR MID CARGO CABIN AMBER COLOR. COMPLETED CONFIGURATION FOR LANDING, DECLARED EMERGENCY, LANDED, PERFORMED EMERGENCY SHUTDOWN, EMERG EVACUATION CHECKLISTS AND VACATED A/C VIA PORT SIDE SLIDE. PER CREW DEBRIEF AND FIRE DEPT NO SMOKE IN THE COCKPIT OR CABIN. NR 4 SMOKE DETECTOR (MAIN DECK) SHOWED FAILED ON THE SYNOPTIC PAGE. RANG WIRES SHOOK DOWN WIRES, R&R THE NR 2R SMOKE DETECTOR., MSC AND NR 1 DEU . CK OK DURING TAXIJ CK