What was found
ON FINAL APPROCH WE SELECTED THE GEAR DOWN. RECEIVED 2 GREEN MAIN GEAR LIGHTS AND THE NOSE GEAR LIGHT REMAINED DARK. PRESSED TO TEST THE NOSE GEAR LIGHT AND HALF OF IT LIT UP GREEN. THIS LED TO THE GEAR DISAGREE CHECKLIST AND MANUALLY LOWERED THE GEAR. DURING THIS PROCESS WE NOTICED ADDITIONAL AIRCRAFT NOISE AND VIBRATION NEAR THE COCKPIT AS IF THE NOSE GEAR WAS STILL UP AND HAD FALLEN. WHILE RUNNING THIS CHECKLIST WE TESTED THE NOSE GEAR LIGHT AGAIN AND IT WOULD NOT ILLUMINATE. REMOVED AND REPLACED NOSE GEAR ANNUNCIATOR LT ASSY