> If the co-pilot is slumped forward, is it not possible that his arm, ipad, checklist or whatever gets pushed onto the door locking button which is right next to him? Surely that is possible.
Given the A320 cockpit layout, very unlikely. Also doesn't account for the descent. (A/P switch and alt controls are up on panel and sidestick is to the side)
Some airlines have iPad holders (I know QF does for example). On the A320 there is a pull out table right in front of you, I would think that would be a place to rest your iPad.
The simplest answer is probably right, this was a deliberate act. It is the only credible answer that can account for the timing, the lockout of the captain, and the descent.