As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6306 - IAD-JFK - DURING CRUISE, RETURNED TO IAD DUE TO THE FLAP ASYMMETRY FAULT ACTIVATING. AIRCRAFT LANDED AT IAD WITH NO FURTHER INCIDENTS. MAINTENANCE ADJUSTED THE RT FLAP POSITION TRANSDUCER. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)