What was found
BWI - FLT 600 - DURING APPROACH TO BWI WHEN LANDING GEAR EXTENDED, LEFT MAIN LANDING GEAR GREEN LIGHT FAILED TO ILLUMINATE. RECYCLED LANDING GEAR WITH SAME RE SULTS. ACCOMPLISHED ABNORMAL PROCEDURE AND AIRCRAFT LANDED BWI WITHOUT INCIDENT. REPLACED LANDING GEAR LEVER MODULE AND LT MAIN LANDING GEAR ANNUNCIATOR LIGHT CAPSULE. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)