What was found
AFTER TAKEOFF DURING GEAR RETRACTION, A LOUD NOISE CAME FROM THE NOSE WHEEL AREA. UPLATCH CHECK WAS NORMAL, HOWEVER, AFTER 5 MINUTES, NOSE GEAR UNSAFE LIGHT ILLUMINATED. FOLLOWED COM PROCEDURE AND RETURNED TO MSP. AIRCRAFT LANDED WITHOUT INCIDENT. FOUND THE RIGHT NOSE GEAR DOOR OPEN AND RIGHT GEAR DOOR LINK INOPERATIVE. REPLACED THE RIGHT GEAR DOOR LINK AND OPERATIONAL CHECK GOOD.