As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD - FLT 2755 - ON CLIMB-OUT FROM IAD, THE NR 6 SLAT DID NOT RETRACT WHEN THE FLAPS WERE MOVED TO UP OR ZERO DEGREES. FLIGHT RETURNED TO FIELD AT IAD AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE NR 6 LEADING EDGE SLAT ACTUATOR IN ASSOCIATION WITH MM 27-81-41A. OPERATIONAL CHECK AND LEAK CHECK GOOD. (X)