As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2508 - EWR - FLIGHT CREW REPORTED L/G AND AIR/GRND DISAGREE MESSAGE ON EICAS. CREW PERFORMED AIR RETURN AND LANDED ACFT UNEVENTFULLY. EWR MX REMOVED AND REPLACED LGEU AND L/G CONTROL LEVER AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. SDR - C2XA09RI195 HAS LGEU INFO SRD C2XA09RI196 HAS CONTROL LEVER INFO. ACFT WAS APPROVED TO RETURN TO SERVICE.