As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 3004 THE CREW REPORTED ON APPROACH WHEN EXTENDING THE LANDING GEAR A LANDING GEAR AIR/GROUND FAIL MESSAGE CAME ON THE EICAS. MAINTENANCE INSPECTED AND ADJUSTED THE LEFT AND RIGHT MAIN GEAR PROXIMITY SWITCH 2. OPERATIONAL CHECKS WERE GOOD.