It has been my experience that whenever the door to the flight deck is open the FAs block the passage to the forward FC lav. Once the crew has finished with the lav and returned to the flight deck (or getting their meals delivered or whatever) and locked the door the FAs re-open the passage.
But not for the entire flight.
Last edited by 8MiHi; Jul 28, 2016 at 1:08 pm