As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 4355 THE CREW REPORTED THE LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF. THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED PCB A316. OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS TEST FLOWN AND NO DISCREPANCY WAS NOTED. THE AIRCRAFT WAS RELEASED FOR SERVICE.