What was found
REJECTED TAKE OFF AT HI SPEED (OVER 80 KTS) ABORTED T/O. TANK 1 INDICATES ALL DASHES. NO EXCESSIVE USE OF BRAKES NEEDED, NO BRAKE OVERHEAT MESSAGE ON EICAS, AND NO BRAKE TEMP INDICATION WENT INTO THE UPPER LIMIT OF THE AMBER RANGE. C/A: CHECKED AC, IAW AMM 05-50-16, NO DEFECT NOTED. AC OK TO RETURN TO SERVICE.