As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2724 - EWR - FLIGHT CREW REPORTED LANDING GEAR AIR GROUND FAILURE INDICATION ON EICAS AFTER TAKEOFF AND THE LANDING GEAR LEVER LOCKED IN THE DOWN POSITION. CREW PERFORMED AIR RETURN AND LANDED UNEVENTFULLY. EWR MX REMOVED AND REPLACED LANDING GEAR CONTROL LEVER AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.