What was found
DURING FLIGHT SMOKE INDICATION ON EICAS AND ON THE OVERHEAD PANEL, BLEW THE BOTTLE IN THE BAGGAGE COMPARTMENT. NEVER HAD ANY INDICATION OF HEAT WHEN JUMP SEAT CAPTAIN CHECKED FOR SMOKE OR HEAT DURING THE DESCENT TO DFW. MAINTENANCE INSPECTED THE AIRCRAFT AND DID NOT FIND ANY EVIDENCE OF A FIRE OR SMOKE. THE SMOKE WARNING INDICATION COULD NOT BE DUPLICATED. MAINTENANCE REMOVED AND REPLACED THE DISCHARGED BAGGAGE COMPARTMENT FIRE EXT BOTTLES. THE AIRCRAFT WAS THEN APPROVED TO RETURN FOR SERVICE. REMOVED INFORMATION IN SECTION 5 SINCE THE PART CAUSING THE DIFFICULTY COULD NOT BE DETERMINED. THIS IS DUE TO THE INABILITY TO DUPLICATE THE INDICATION AND NO EVIDENCE OF OVERHEATING AND/OR FIRE.