As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT#3222 THE CREW REPORTED A LANDING GEAR AIR/GROUND FAIL MESSAGE AFTER TAKEOFF.A EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT.AFTER EXITING RUNWAY THE MESSAGE DISAPPEARED.THEY ALSO REPORTED ENGINE 1 AND 2 THRUST REVERSER DISAGREE MESSAGE.MAINTENANCE INSPECTED AND REPLACED THE NOSE GEAR WOW PROXIMITY SENSOR AND SERVICED THE NOSE LANDING GEAR SHOCK ABSORBER.OPERATIONAL CHECKS WERE GOOD.THE AIRCRAFT WAS RELEASED FOR SERVICE.