What was found
6158 - AFTER RAISING THE LANDING GEAR ON TAKEOFF RECEIVED A GEAR DISAGREE WARNING MESSAGE AND DOOR WARNING MESSAGE. C/W BOTH QRH'S BOTH MESSAGE CLEARED. MESSAGE'S APPEARED. 6 SECOND AFTER SELECTION AT APPROX 165 IAS. NO OTHER ASSOCIATED MESSAGED, NOSE GEAR INDICATED RED, NO ICING CONDITION. EMER DECLARED. AIRCRAFT REMOVED FROM SERVICE. PERFORMED OPS CHECK/INSPECTION OF NOSE GEAR DOOR IREF AMM 32-22-01. OPS CHECK GOOD. C/W M ACTION FOR MEL 32-30-01. REF 359968/2 FOR MEL INSTALLED NLG HYD SELECTOR VALVE IAW AMM 32-20. OPS CHECK GOOD. REMOVED PLACARD AND MEL.