What was found
(CAN) NOSE LANDING GEAR DOWN/LOCK INDICATION ILLUMINATED THEN WENT OUT WHILE ON APPROACH.AIRCRAFT ABORTED APPROACH AND WENT AROUND LIGHT ILLUMINATED AGAIN WHILE AIRCRAFT WAS ON APPROACH AND LANDED SAFELY. UPON ARRIVAL AT THE HANGAR THE LIGHT WAS AGAIN OUT. AIRCRAFT WAS BROUGHT INTO HANGAR AND JACKED, GEAR WAS SWUNG AND NOSE GEAR DOWN AND LOCKED FAILED TO ILLUMINATE. SYSTEM WAS TROUBLESHOT AND FOUND TO HAVE A FAULTY NOSE GEAR DOWNLOCK SWITCH. FAULTY SWITCH WAS REPLACED AND RIGGED IAW AMM. AIRCRAFT WAS RETURNED TO SERVICE. (TC# 20190424027)