As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 2409 THE CREW REPORTED A AIR/GROUND FAIL MESSAGE IN FLIGHT. THE LANDING GEAR WOULD NOT RETRACT, ALSO RECEIVED A ENG REV 1&2 DISAGREE MESSAGE ON THE ECIAS. MAINTENANCE INSPECTED AND REPLACED THE NOSE LANDING GEAR AIR/GROUND PROXIMITY SWITCH AND HARNESS. OPERATIONAL CHECKS WERE GOOD. HARNESS P/N 145-21495-405.