As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 6133 - ABE TO ORD - FLIGHT CREW REPORTED LG AIR/GRND FAIL MESSAGE ON EICAS AFTER TAKEOFF AND LANDING GEAR LEVER COULD NOT BE MOVED TO UP POSITION. CREW DIVERTED FLIGHT TO EWR AND LANDED UNEVENTFULLY. EWR MX REMOVED AND REPLACED RT GEAR AND NOSE LANDING GEAR PROX SWITCHES AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.