As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - CREW REPORTED NOSE AIR TO GROUND DISAGREE EICAS WARNING MESSAGE. FLIGHT RETURNED MIA LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND PIN NUMBER TWO AT D1756J PUSHED BACK. REPOSITIONED AND SECURED PIN NUMBER TWO AT D1756J. SYSTEM GROUND CHECK NORMAL OPERATION.