What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO JKF. DURING CLIMB AT APPROXIMATELY 17,000 THE AFT CARGO COMPARTMENT FIRE LIGHT ILLUMINATED AND THE BELL ACTIVATED. FLIGHT CREW RAN THE QRH PROCEDURES AND DISCHARGED THE AFT CARGO COMPARTMENT FIRE BOTTLES. DURING THE RETURN TO JFK THE FIRE LIGHT AND BELL ACTIVATED SEVERAL MORE TIMES. THE AIRCRAFT LANDED SAFELY AT JFK WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED THE AFT CARGO COMPARTMENT AND FOUND NO EVIDENCE OF SMOKE OR FIRE. MAINTENANCE FOUND THE AFT CARGO COMPARTMENT SMOKE DETECTORS AT POSITIONS A1 (AALA202309013051) AND B1 (AALA202309010062) FAULTED. MAINTENANCE REPLACED THE SMOKE DETECTORS PER AMM 26-16-01. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.