As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CVG - FLT 2424 THE CREW REPORTED THE LANDING GEAR WOULD NOT RETRACT DURING CLIMB FROM CVG. THE AIRCRAFT RETURNED TO CVG AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE LEFT GEAR NR 2 WOW SWITCH HARNESS AND THE RIGHT GEAR NR 2 WOW SWITCH CONNECTOR. OPERATIONAL CHECKS WERE GOOD AND THE AIRCRAFT WAS RELEASED FOR SERVICE.