What was found
DURING CLIMB AT 13,000 FT, RECEIVED A BAGGAGE SMOKE MESSAGE ON EICAS AND BAGGAGE EXTINGUISHER LIGHT ILLUMINATED. DEPLOYED EXTINGUISHER BOTTLE IAW EPC. BAGGAGE SMOKE WARNING WENT AWAY AND BAGGAGE EXT INOPERATIVE ON EICAS. NO SIGNS OF SMOKE. DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE. LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. PERFORMED VISUAL INSPECTION OF BAGGAGE COMPARTMENT SMOKE DETECTOR, NO DAMAGE NOTED AND PERFORMED BAGGAGE FIRE EXT SYS OPC IAW AMM 26-23-00. OPS CHECKED GOOD. ACFT RETURNED TO SERVICE.