Goldenrivett
How do you explain the following part about 4okts. Then where does 72 kt get in?
DSC 32-30-10 AUTOBRAKE -GENERAL
SYSTEM ACTIVATION
Automatic braking is activated:
‐ at the command for ground spoilers extension (Refer to DSC-27-10-20 Speed Brakes and Ground Spoilers - Speed Brake Control), for LO and MED mode.
‐ at the command for ground spoilers extension and the aircraft speed is above 40 kt, for MAX mode.
Therefore, if the aircraft makes an acceleration stop and begins to decelerate when its speed is under 72 kt, the automatic braking will not activate because the ground spoilers will not extend.
For autobrake to activate, at least two SEC's must be operative.