Reference distance is for sea level, standard day, no wind or slope, VREF40 approach speed and two engine detent reverse thrust. Max manual braking data valid for auto speedbrakes. Autobrake data valid for both auto and manual speedbrakes. For max manual braking and manual speedbrakes, increase reference landing distance by 180 ft. Actual (unfactored) distances are shown. Includes distance from 50 ft above threshold (1000 ft of air distance).