As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6261 - IAD-EWR - DURING CLIMB-OUT RETURNED TO IAD DUE TO GEAR NOT RETRACTING WHEN SELECTED UP. AIRCRAFT LANDED AT IAD WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED THE RIGHT MAIN GEAR WEIGHT ON WHEELS MICROSWITCH. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)