What was found
MCO - FLT 927 - LEFT ENGINE FIRE DETECT LOOP 'B' LIGHT ILLUMINATED WITHOUT FIRE WARNING. COMPLETE QRH PROCEDURE. SWITCHED TO NR 1 'A' LOOP ONLY ON PANEL. TESTED A/B LOOP NR 2 ENGINE, OPS OK. INSPECTED ENTIRE LEFT ENGINE LOOP SYSTEM AND PERFORM BITE. FOUND LOOP B LEFT ENGINE (AMBER) LIGHT SWITCH ASSY IN COCKPIT ON OVERHEAD PANEL WIRES MAKING CONTACT WITH FRAME. ADJUSTED WIRE POST ON SWITCH IAW MD80 MM 26-11-00 OPERATION CHECK OK. (M)