As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6551 - IAD-CLE - ABORTED TAKEOFF DUE TO CONFIGURATION WARNING. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE CLEANED CONNECTOR ON THE FLAP POSITION TRANSDUCER. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)