What was found
LOUD BANG AND PRONOUNCED VIBRATION WAS FELT FROM THE NOSE WHEEL WELL AREA. UPON GEAR RETRACTION, UNSAFE GEAR DOOR ( NOSE WHEEL ) AMBER LIGHT REMAINED ON BOTH PANELS, QRH WAS FOLLOWED. GEAR HANDLE WAS NOT SELECT ED TO NEUTRAL. ONCE DECIDED TO EXTEND GEAR FOR LANDING, NOSE WHEEL EXTENDED WHEN THE GEAR HANDLE WAS BETWEEN THE UP POSITION AND NEUTRAL ( NOT NORMAL ). WHEN STATUS PAGE SELECTED, IT SHOWED L/G RETRACTION NOT AVAIL OR INOP.