What was found
AFTER TAKEOFF PLACED GEAR HANDLE IN UP POSITION & ONLY THE MAIN GEAR LIGHTS EXTINGUISHED. TOWER CONFIRMED THAT OUR NOSE GEAR WAS STILL DOWN. PLACED GEAR HANDLE BACK TO THE DOWN POSITION & GOT 3 GREEN INDICATION. REMOVED NOSE UP LOCK SWITCH & WIRING HARNESS & INSTALLED NEW SWITCH & HARNESS. PERFORMED NUMEROUS OPERATIONAL CHECKS, ALL GOOD. WORK DONE IAW MM 32-30-05 & 32-30-00. PARTS REPLACED, WIRE BUNDLE PN 6748001-1, NSN, SWITCH NOSE GEAR UP LOCK SG005 PN S3177-1, NSN.