As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6366 - IAD-CHS - DURING TAKEOFF, MADE A UNSCHEDULED LANDING AT IAD DUE TO FLAP FAULT LIGHT WOULD NOT RESET. AIRCRAFT RETURNED TO GATE AT IAD WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED FLAP POSITION TRANSDUCER, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)