As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT NR 2496 - THE CREW REPORTED, THE LANDING GEAR WOULD NOT RETRACT ON CLIMB-OUT. THE AIRCRAFT RETURNED TO CLEVELAND AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE LANDING GEAR ELECTRONIC UNIT. OPERATIONAL CHECKS WERE GOOD.