As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALB/BOS - FLT 6685 - CREW NOTED CARGO SMOKE DETECTOR LIGHT ILLUMINATED. CREW DISCHARGED THE CARGO FIRE BOTTLE AS PART OF THEIR CHECK LIST AND RETURNED TO ALB. LANDED WTHOUT INCIDENT. ALB MAINTENANCE REPLACED BOTH FORWARD AND AFT CARGO SMOKE DETECTORS AND THE CARGO FIRE BOTTLE. THE AIRCRAFT WAS THEN RETURNED TO SERVICE. REF: OPER CNTRL NR PLGA990707.