As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 6263 - TAKEOFF ABORTED WHEN THE AIRCRAFT PULLED TO THE RIGHT ON TAKEOFF ROLL. AIRCRAFT RETURNED TO THE GATE. MAINTENANCE FOUND THE NR 4 BRAKE TO BE DRAGGING. THE BRAKE ASSEMBLY WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE. FURTHER INVESTIGATION REVEALED THE BRAKE WAS WITHIN WEAR LIMITS AND THE ANOMOLY COULD NOT BE DUPLICATED DURING AN AS RECEIVED INSPECTION OF THE BRAKE. (M)