What was found
AFTER TAKEOFF, SELECTED GEAR UP AND RECEIVED GEAR DISAGREE AND NOSE DOOR OPEN WARNING MESSAGE. NLG WAS DOWN AT THE TIME. WITHIN 6 SECONDS OF GEAR UP SLECTION. ALSO RECEIVED STEERING INOPERATIVE, WOW INPUT AND WOW OUTPUT CAUTION MESSAGES. COMPLIED WITH THE QRH, AND SLECTED NR 2BH AND 3B HYD PUMPS ON, NO CHANGE. SELECTED ALTERNATE EXTENSION, GEAR SHOWED ALL 3 GREEN. MESSAGES CLEARED EXCEPT STEERING INOPERATIVE AND WOW INPUT. MC SELECTED NORMAL GEAR HANDLE DOWN, LANDED WITHOUT INCIDENT AND AFTER A COMPLETE STOP CYCLED THE NOSE GEAR STEERING SELECTOR SWITCH. ALL MESSAGES CLEARED. TAXIED TO GATE.