What was found
CARGO SMOKE LIGHT ILLUMINATED AT FL 350 0200 ZULU. RAN SMOKE SOURCE IDENTIFICATION CHECKLIST. CHECKED AFT CARGO FOR SMOKE OR FIRE INDICATIONS; FOUND NONE. FOR PRECAUTIONARY PURPOSES, REQUESTED PRIORITY HANDLING FROM ATC TO ATL. LIGHT STAYED ILLUMINATED UNTIL 3000 FT MSL 0221 ZULU. LIGHT REMAINED OUT AFTER 3000 FT MSL. LANDED WITHOUT INCIDENT AT 0224Z. NO SMOKE OR FIRE INDICATION FOUND ON GROUND. INSPECTED ALL SMOKE DETECTORS IN THE MAIN CARGO DECK. FOUND NR 2 SMOKE DETECTOR SLOW TO RESPOND WHEN PTT. NR 2 SMOKE DETECTOR WAS WET. REMOVED AND REPLACED NR 2 SMOKE DETECTOR IAW MM 26-00-0. OPS CHECKED GOOD.STATUS: CLOSED