What was found
DURING APPROACH, NOSE LANDING GEAR GREEN DOWNLOCK LIGHT DID NOT ILLUMINATE AFTER GEAR EXTENSION. CREW RECYCLED GEAR AND CHANGED BULBS WITH SAME RESULTS. VISUAL CHECK THROUGH PERISCOPE CONFIRMED GEAR TO BE DOWN AND LOCKED. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED NOSE GEAR UPLIMIT SWITCH, OPERATIONAL CHECK NORMAL ON GEAR SWING.