As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6330 - IAD-BOS - DURING CLIMB, AIRCRAFT MADE AN UNSCHEDULED LANDING AT IAD DUE TO LANDING GEAR SLOW TO RETRACT. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED ALL THREE HYDRAULIC FILTER AND PERFORMED GEAR SWING. OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)