Originally Posted by bdcer
i don't want to give away too much, but the cabin manager can definitely enter the flightdeck post depressurisation.
Not if someone in the cockpit wants to keep them out, in the airline I work for at least.
The lockout feature is in case of a crew member going rogue, turning suicidally feral, or becoming unlawfully compromised by persons outside the hardened flight deck door.
However, you can see the holes in the cheese lining up if one pilot leaves the FD and the remaining pilot turns feral and locks him/her out for whatever reason... Not suggesting this is applicable in this case, but it's worthy of discussion at another time and place.