What was found
ON FINAL, APPROXIMATELY 1,000 FEET ABOVE GROUND LEVEL THE NOSE GEAR GREEN INDICATION WENT OUT CAUSING HORN TO SOUND. EXECUTED GO-AROUND AND ON CLIMBOUT GREEN INDICATION RE-ILLUMINATED. THREE GEAR PINS INSTALLED, RAN GEAR HANDLE SEVERAL TIMES, OPERATIONAL CHECKS NORMAL ON GROUND. REMOVED GEAR PINS, REMOVED AND REPLACED NOSE LANDING GEAR LOCK AND POSITION SWITCHES PER MAINTENANCE MANUAL 32-61-21. OPERATIONAL TEST PER MAINTENANCE MANUAL 32-61-21 PAGE 502 IS NORMAL.