Originally Posted by
DeltaT
Resurrecting an old thread I know, but I have the same question, that I am trying to get my head around.
So to make sure of my understanding then, due to the cabin trying to keep a positive differential, it potentially, not necessarily will, take the cabin to a slightly lower altitude than the one you are at on the ground?
My understanding as a mechanic is: For some reason the cabin pressure has stayed at the pressure previously selected by pilots whilst at altitude.
On the ground the pax and crew would not really notice this increased pressure, until of course an attempt was made to open a door.
An incident in PNG comes to mind, exactly this situation at POM, the FO when notified by cabin crew selected manual dump.
Nose bleeds, ruptured eardrums and much wailing and gnashing ensued.