What was found
BTV - FLT 4221 - DURING DESCENT INTO BTV, THE CARGO COMPARTMENT SMOKE WARNING LIGHT ILLUMINATED. THE CREW FOLLOWED PROCEDURES AND DISCHARGED THE FIRE EXTINGUISHER BOTTLE. THE WARNING LIGHT EXTINGUISHED. AIRCRAFT CONTINUED TO BTV AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND NO INDICATION OF FIRE OR SMOKE IN CARGO AREA. BOTH SMOKE DETECTORS WAS REPLACED ALONG WITH EXTINGUISHER BOTTLE. AIRCRAFT RETURNED TO SERVICE. DETECTOR P/N 72-111211-000, S/N A4370/9137. (M)