Originally Posted by
CollegeFlyer
I I don't think that's the reason. It's not like the FA could land the plane if the one pilot in there died or passed out. She might be able to administer CPR but...really you'd need a second pilot to land the plane.
The FA is in the cockpit - so should the remaining flight officer have a problem - the FA would be able to open the cockpit door and let the flight officer who is using the restroom back in the cockpit.