What was found
BOS - FLT 4358 - WHLE DESCENDING INTO BOS, THE CREW RECEIVED A SMOKE WARNING IN BOTH CARGO AND LAVATORY COMPARTMENTS. CREW DECLARED AN EMERGENCY AND FOLLOWED PROCEDURES. THE CARGO COMPARTMENT FIRE EXTINGUISHER WAS DISCHARGED AFTER WHICH BOTH WARNING LIGHTS EXTINGUISHED. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED BOTH COMPARTMENTS AND FOUND NO EVIDENCE OF FIRE, SMOKE OR HEAT DAMAGE. BOTH CARGO AND LAVATORY COMPARTMENT SMOKE DETECTORS WERE REPLACED ALONG WITH FIRE EXITNGUISHER BOTTLE. AIRCRAFT WAS RETURNED TO SERVICE. (M)