Originally Posted by gas path
If it was only at 3psi it was waaaay short of the 'high blow' figure
Indeed. 200 mb differential? The pressure in cruise is what, 750 mb? This meant that the door would blow at 550 mb outside, meaning below 5000 metres... unless the pressurization is started gradually after takeoff instead of at 2400 metres, in which case 200 mb differential would be reached lower than 5000 metres! A cargo plane exploding on climbout...