What was found
DURING CRUISE, RECEIVED AN EICAS BAGGAGE SMOKE INDICATION AND OVERHEAD, AUROL WARNING. PERFORMED THE EMERGENCY CHECKLIST AND THE BAGGAGE SMOKE LIGHT EXTINGUISHED & THEN CAME BACK ON. BOTTLE WAS DISCHARGED. THE CREW DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE. THE ACFT LANDED WITHOUT INCIDENT. THE ACFT WAS REMOVED FROM SERVICE. R & R CARGO REAR SMOKE DETECTOR IAW MM 26-15-01. OPT CHECK FOUND SATISFACTORY IAW MM 26-15-00. PERFORMED CARGO SMOKE DETECTOR, INSPECTION CHECK IAW AMM 26-15-01. FOUND OK. NO EVIDENCE OF SMOKE. FOUND BAGGAGE TEST SWITCH S7265 ON MAINT PANEL BAD. CARTRIDGE LOWER, PN: M30903870. CARTRIDGE UPPER, PN: M30903870. FIREX BOTTLE-630 CU. IN., PN: 346000731, SN: 1959F1. FIREX BOTTLE-630 CU.IN., PN: 346000731. SN: 1959F1. SWITCH, PN: M83731/10-271. CARGO AREA SMOKE DETECTOR, PN: 473597-13. SN: 1059. THE OPS CHECK WAS GOOD. THE ACFT WAS RETURNED TO SERVICE.