As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAKEOFF REJECTED AT 50KTS DUE TO BRAKE SYSTEM 2 FAULT. BRAKE TEMPS ABOUT 300 DEGREES. PERFORM CHECKS OF TIRES AND BRAKES AND ENSURE NO ISSUES NOTED. LOW SPEED REJECTED TAKEOFF BY CREW. BRAKES TEMPS REMAINED IN NORMAL RANGE PERFORMED CHECK OF TIRES AND BRAKES. NO DEFECTS NOTED PER AMM 32-42-00.