What was found
DURING APPROACH INTO MSP, NOSE LANDING GEAR GREEN DOWNLOCK LIGHT DID NOT ILLUMINATE AFTER GEAR EXTENSION. CREW EXECUTED GO-AROUND AND UTILIZED EMERGENCY GEAR EXTENSION PROCEDURES ON SECOND APPROACH. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED LANDING GEAR CONTROL VALVE, BUNGEE CYLINDER, CHECK VALVES, AND TWO-WAY RESTRICTORS IN WHEEL WELL CEILING. OPERATIONAL CHECK NORMAL ON GEAR CYCLE. AIRCRAFT RETURNED TO SERVICE.