What was found
ON TAKEOFF AFTER RELEASE OF BRAKES WE RECEIVED LO BRAKE PRESS. ALSO ANTI-SKID INOPERATIVE LIGHTS, FOLLOWED BY MASTER CAUTION LIGHT. ABORTED TAKEOFF AT APPROX 20K. LOST MAIN HYD BRAKES, USED AIR BRAKES & THRUST REVERSE TO STOP. NOTICED POWER BRAKES CB POPPED. ALSO HYD PUMP RUNS LONGER THAN NORMAL. R & R POWER BRAKES HYD PACK MOTOR WITH AN OVERHAULED UNIT. LEAK, OPERATIONAL & FUNCTIONAL CHECKS COMPLETED WITH NO DEFECTS NOTED IAW MM 32-42-06. R & R POWER BRAKES HYD PACK PUMP WITH NEW PUMP. LEAK, OPERATIONAL & FUNCTIONAL CHECKS COMPLETED WITH NO DEFECTS NOTED IAW MM 32-42-06.