What was found
AFTER GEAR RETRACTION THE YELLOW NOSE DOOR AND RED NOSE GEAR LIGHTS REMAINED ILLUMINATED. DID AN ALTERNATE GEAR EXTENSION GEAR CAME DOWN AND LOCKED 3 GREEN. DID NOT EXCEED ANY OF THE AIRSPEEDS IAW THE CHECKLIST. LANDING UNEVENTFUL. FERRY FOR REPAIRS. RIG CHECK OF NLG SEQUENCE VALVE, VERIFICATION OF NOSE WHEEL CENTERING, INSP OF CONNECTOR PLUGS FOR NLG HARNESSES. GVI OF NLG ASSY, GVI OF NLG DOOR MECHANISIM, INSP OF SSV FILTERS, CYCLED GEAR NUMEROUS TIMES, ALL CHECKED GOOD. RETURNED TO SERVICE.