What was found
BOS - FLT 1178 - DURING APPROACH TO BOS, WHEN LANDING GEAR EXTENDED, RIGHT MAIN LANDING GEAR GREEN LIGHT DID NOT ILLUMINATE. RETRACTED LANDING GEAR AND REPLACED BULBS IN RIGHT MAIN LANDING GEAR ANNUNCIATOR LIGHT CAPSULE. WHEN LANDING GEAR EXTENDED AGAIN, ONE GREEN LIGHT ILLUMINATED. AIRCRAFT LANDED BOS WITHOUT INCIDENT. REPLACED RIGHT MAIN LANDING GEAR ANNUNCIATOR LIGHT CAPSULE AND BULBS. ACCOMPLISHED LANDING GEAR RETRACTION CHECK WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)