What was found
ON APPROACH WITH LANDING GEAR SELECTED DOWN, CREW DID NOT GET A GREEN DOWN AND LOCKED LIGHT ON THE NOSE GEAR. ALSO, THE RED LIGHT WAS OUT. WHILE EXECUTING A GO-AROUND, THE GREEN NOSEGEAR DOWN AND LOCKED LIGHT ILLUMINATED. REPLACED NOSE GEAR LOCKED PROX SENSOR AND NOSE GEAR DOWN SWITCH. JACKED AIRCRAFT AND PERFORMED GEAR SWING, NO FAULTS NOTED DURING CK.