I think I had seen that graph somewhere as well. the 0.1 psi on a door amounts to about 110 to 120 kg force which would still be difficult to pull in.
My understanding though of that particular door, though I may be incorrect, is that it uses essentially a pin and angled guide arrangement to seal the door as the door moves down.
So assuming a 0.3 friction factor it would only need approx. 35kg of force to start it moving up to release which is well within the capabilities of a stressed individual and perhaps much less if the mechanism has some sort of lever arm action?
Of course at altitude when you have even 2 or 3 psi, that force becomes un feasible for anyone to shift the door.
I can vouch for the 7-8000 ft internal altitude as I once took my skydiving altimeter with me in the plane as I didn't want it going round the clock three times ( they go 0-12,000 ft in one sweep) and it sat at about 7,500ft at top of climb.
Just very surprised this doesn't seem to have happened before now given the millions of flights. Maybe they will start to put flight crew next to those doors?
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