As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6345 - IAD-LGA - DURING THE CRUISE, RETURNED TO IAD DUE TO THE FLAP ASYMMETRY WARNING ILLUMINATING IN FLIGHT. AIRCRAFT LANDED AT IAD WITH NO FURTHER INCIDENTS. MAINTENANCE ADJUSTED THE LEFT AND RT FLAP POSITION TRANSDUCERS. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)