# If the pilot cabin loses pressure, can the pressure difference lock the cockpit door?

I think, if there is only a 0.1 bar pressure difference with a single square meter door, around the weight of a ton would be needed to open it - if it is sealed hermetically and opens outward.

Is it possible?

• If you're thinking about the Germanwings crash, note that according to the AvHerald article, the CVR heard the first officer breathing normally during the entire descent. – hmakholm left over Monica Mar 27 '15 at 3:11
• Can the pressure equalize thru ECS (page 11)? – mins Mar 27 '15 at 7:54
• @HenningMakholm Ok, it will be my next question - human breath is normally silent, especially with the backgroound noice of a plane. – Gray Sheep Mar 27 '15 at 11:18
• @HenningMakholm Sorry for the late reaction - but, depressurization doesn't cause shortness of breath. It is caused by the increased $CO_2$ concentration in the blood. In the case of depressurization, this decreases. I once talked with a pilot, he said they were trained for that. As he said, he didn't feel any asphyxication, he feels himself normal - except that he starts to feel his body extremely weighty. And they lose consciousness very quickly, there is no willpower what could it compensate. And he breathes normally. – Gray Sheep Feb 8 '18 at 18:43