As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT NR 2227 THE CREW REPORTED A AIR/GROUND FAIL MESSAGE AFTER RETRACTION UNTIL ABOUT 300AGL. THE GEAR DID NOT RETRACT. MAINTENANCE INSPECTED AND COULD NOT FIND ANY DEFECTS. ALL 5 WEIGHT ON WHELLS PROXIMITY SWITCHES WERE REPLACED FOR PRECAUTIONARY REASONS. THE AIRCRAFT WAS RELEASED FOR SERVICE.