As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6181 - IAD-BWI - DURING CLIMB-OUT, RETURNED TO IAD DUE TO RIGHT MAIN GEAR NOT RETRACTING WHEN THE GEAR SELECTED UP. AIRCRAFT LANDED AT IAD WITH NO FURTHER INCIDENTS. MAINTENANCE BLED THE RT MAIN GEAR RETRACTION ACTUATOR. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)