As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON STARING TAKEOFF ROLL, LOUD NOISE AND LEFT BRAKE MALFUNCTION OCCURRED. TAKEOFF ABORTED. LEFT MAIN BRAKE DISC HAD BROKEN LOOSE FROM MAIN WHEEL BOLTS. SUSPECT CAUSE WAS CRACKS IN DISC. SUBMITTER RECOMMENDS INSPECTION OF DISC FOR CRACKS.