German-Wings Copilot "one of us"?

On 3/27/2015 6:33 PM, Mike Schumann wrote:
snip

The problem is that the cockpit security precautions that were
implemented as a result of the post 9/11 security hysteria have now
created a new unanticipated vulnerability. In this new environment,
where every hijack event is going to be vigorously fought by the crew
and passengers, maybe armored cockpit doors are no longer a good idea.

I thought I read that the aircraft has a keypad outside the cockpit door
and, upon entry of the emergency override code, which the captain should
have known, the door would unlock for a short time after a specific delay.

--
Dan Marotta