As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 2144 THE CREW REPORTED AFTER TAKEOFF RECEIVED A LANDING GEAR AIR/GROUND FAIL MESSAGE ON THE ECIAS. THE AIRCRAFT RETURNED TO CLEVELAND AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND TIGHTENED THE BACKSHELL AND CLEANED THE CONNECTOR PLUG TO THE NOSE GEAR WEIGHT ON WHEELS PROXIMITY SENSOR. OPERATIONAL CHECKS WERE GOOD.