What was found
DTW - FLT 632 - CARGO SMOKE DETECTOR LIGHT CAME ON IN FLIGHT. AFT CARGO LOOP B DETECTOR LIGHT ALSO CAME ON. NO HORN, NO MASTER CAUTION, NO MASTER WARNING LIGHTS WENT OUT AFTER 2-3 MINUTES. PERFORMED CARGO SMOKE DETECTION SYSTEM CHECK, OPS CHECK GOOD IAW BARFIELD MM 26-16-00. NO FAULT FOUND. (M)