What was found
GEAR DISAGREE WARNING MESSAGE AFTER GEAR RETRACTION ON TAKE-OFF. AFTER SELECTING THE GEAR LEVER TO UP POSITION WE HEARD A GRINDING NOISE FROM THE NOSE GEAR BAY. APPROXIMATELY 20 SECONDS LATER, THE GEAR DISAGREE WARNING OCCURRED. WE FOLLOWED THE QRH WHICH DIRECTED US TO PULL THE EMERGENCY GEAR EXTENSION LEVER, WARNINGS CLEARED. HYD B PUMPS AUTO ON TAKE-OFF. AIRCRAFT REMOVED FROM SERVICE. FOUND NLG UPLOCK TO BE INTERMITTENTLY LATCHING AFTER THE GEAR HANDLE HAS BEEN SELECTED UP. R & R NLG UPLOCK, IAW 32-33-05, OPERATIONS CHECK GOOD. NOISE FOUND DURING GEAR TRANSITION IS THE BRAKES BEING APPLIED/SPINDOWN AMM 32-43-00, NO DEFECTS NOTED.