As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/BOS - DURING TAKEOFF AT 1430 HRS ON 2-21-96, ABORTED TAKEOFF DUE TO TAKEOFF CONFIGURATION SYSTEM ACTIVATING. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED FLAP POSITION TRANSDUCER. AIRCRAFT RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)