As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6225 - IAD-BOS - ABORTED TAKEOFF DUE TO TAKEOFF CONFIGURATION WARNING ILLUMINATED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED SYSTEM AND RESET GUSTLOCK HANDLE. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)