As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD-BDL - FLT 6521 - DURING TAKEOFF, ABORTED THE TAKEOFF DUE TO THE TAKEOFF WARNING SOUNDING ON THE TAKEOFF ROLL. ACFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE ADJUSTED THE NR 1 AND NR 2 FLAP POSITION POTENTIOMETERS TO ZERO. ACFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (W)