Originally Posted by
BMEP100
Only if it's closed.
The old reason for having two hardened doors was so that at no time would a passenger have access to the cockpit. The outer door between the lav and the passengers is closed and locked before the inner door between the cockpit and the lav is opened. There would always be a locked door between the passengers and the cockpit.
The new reason for having two hardened doors is so that the inner door can remain open during the bathroom break so that a pilot cannot be locked out of the cockpit, whether due to mechanical failure or hostile act. A third person would always be in the secure area to make sure the door remains open.
This would likely require a seat reconfiguration to allow a hardened wall and door somewhere between the lav and the first row of seats.