As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON RETRACTING THE LANDING GEAR ON DEPARTURE, A GEAR DISAGREE MESSAGE ON EICAS WARNING CYCLING ON/OFF 3 TIMES AND REMAINED ON UNTIL LANDING GEAR WAS SHOWING ALL 3 GEAR DOWN AND LOCKED, RETURNED TO DEPARTURE. NOSE GEAR WAS NOT SHOWING FULLY RETRACTED. ENTERED DMR MXC 4103, DEFERRED IAW MEL 32-30-1. ADJUSTED NLG UPLOCK PROX SENSOR PX22.