What was found
ON INITIAL APPROACH TO GRI, NOSE GEAR POSITION INDICATOR LIGHT FAILED TO ILLUMINATE WHEN LG HANDLE WAS SELECTED IN THE DOWN POSITION. PILOT PERFORMED A MANUAL EXTENSION OF THE LG IAW ABNORMAL PROCEDURE LISTED IN AIRCRAFT FLIGHT MANUAL. PILOT PERFORMED A FLY BY THE TOWER TO VERIFY GEAR WAS IN THE DOWN & LOCK POSITION, AFTER TOWER CONCURRENCE, AS A PRECAUTION PILOT DECLARED AN EMERGENCY & LANDED WITHOUT FURTHER INCIDENT. MX TROUBLESHOOT REVEALED FAULTY NOSE GEAR DOWN LOCK SWITCH, NOTED SWITCH WAS R & R WITH NEW PART, MX PERFORMED OPERATIONAL CHECKS OF SWITCH, ALL CHECKED WERE NORMAL.