As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THE CREW REPORTED HEARING A LOUD THUD FROM THE NOSE LANDING GEAR FOLLOWED BY A MOMENTARY AMBER INDICATION ON THE EICAS DISPLAY. THE INDICATION WENT TO NORMAL "UP" INDICATION AND THE AIRCRAFT CONTINUED ONTO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE NOSE LANDING GEAR UPLOCK BOX TO BE THE CAUSE OF THE INDICATION. THE UPLOCK BOX WAS REPLACED, OPERATIONAL CHECKS PERFORMED AND THE DISCREPANCY WAS CLEARED.