As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/CLE - FLT 7451 - DURING TAKEOFF, AIRCRAFT MADE AN UNSCHEDULED LANDING DUE TO GEAR WOULD NOT RETRACT. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED WOW SWITCH. MAINTENANCE PERFORMED GEAR SWINGS AND OPS CHECKED OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (X)