What was found
AFTER TAKEOFF, RECEIVED A GEAR DISAGREE WARNING MESSAGE. AT THAT TIME NLG INDICATED DOWN & LOCKED. MAINS WERE WHITE IN TRANSIT. ALSO RECEIVED ANTI-SKID INBD, PARK BRAKE SOV NWS & WOW INPUT CAUTION MESSAGES ALONG WITH NOSE DOOR OPEN WARNING MESSAGE. COMPLIED WITH QRH FOR GEAR DISAGREE, GEAR UP DISAGREE. HYD 2 & 3 B PUMPS SELECTED TO ON, LANDING GEAR MANUAL RELEASE PULLED, SELECTOR LEVER DOWN. GEAR EXTENDED & MANUAL RELEASE LEVER WAS STOWED. WOW INPUT & NWS CAUTION MESSAGES ALONG WITH WOW OUTPUT FAIL STATUS MESSAGE. CYCLED NWS SWITCH. NWS CAUTION MESSAGE CLEARED. OTHER MESSAGES CLEARED ON LANDING. DECLARED EMERGENCY. ALL STRUT HEIGHTS LOOK APPROPRIATE & EVEN.