As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2331 - EWR - FLIGHT CREW REPORTED LANDING GEAR FAIL MESSAGE ON EICAS. CREW DECLARED EMERGENCY AND PROCEED WITH AIR RETURN. CREW LANDED UNEVENTFULLY. EWR MX REMOVED AND REPLACED LGEU AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.