thank you de facto
but i still want to make this clearer~
after the first touch down with TLA ＞44°, the speedbrake will not deploy.
but it is kind of actuated just not moving, just like loading the bullet into the gun waiting for pulling the trigger, which here means the TLA ＜44°?
But in common sense, the aircraft should actuate when all the required conditions all exist at the same time~
Is this a Boeing intendtional design? But it caused so many hard landings!