As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 4135 THE CREW REPORTED THE LANDING GEAR DID NOT RETRACT AFTER TAKEOFF. THE AIRCRAFT RETURNED TO CLEVELAND AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR ELECTRONIC UNIT AND THE LANDING GEAR CONTROL LEVER. OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS RELEASED FOR SERVICE.