Originally Posted by
Lord Spandex Masher
It doesn't mitigate a thing.
I've posted this before but imagine if Lubitz had persuaded the CC that the captain was acting weird and to not let him back in?
I am constantly surprised by the low opinion 'front crew' have of the 'rear crew'.
Most of the cabin crew are very very aware of the progress of the flight as they have a set number of tasks to carry out in sometimes very brief periods. Starting descent just after level off when the flight attendant is aware that there is an hour to go would be extremely suspicious. All the flight attendant does then is open the door. This becomes extremely likely when the aircraft is in high rate descent approaching mountains.
You also need to take into account that the 'alone in the cockpit' part was needed as most suicides are solitary events.