|Quoting tomlee (Reply 264):|
Quoting tailskid (Reply 262):
But the "attacker" would be sitting down and belted in. There could be no surprise attack.
How do you know the person sitting down and belted in is the one who is attacking. Not to mention how does that stop them from punching them out or asking them to do something that puts them in range. No one is going to expect someone to try and kill them. One person defending against another just means it takes one bad person to break the system same as the current one they just have to be a bit physical but if they are willing to take everyone down with them then they probably don't care.
With a multi-person override system it takes many to open the door and in an abuse situation only one person is required to stop the override from being used.
No need to be so complicated really, all the system need to have is two sets of emegency code and two sets of hijack code. For both lock out and hijack scenario.
One sets of emergency code is distribute to the pilots, one sets is distribute to the cabin crew.
If for whatever reason, the cockpit door is lock by the pilot inside, while another pilot is outside the cockpit, the people outside needs to enter both sets of emergency code and they will be able to obtain immediate access to the cockpit (no delay in unlocking), This should by pass any locking mechanism inside the cockpit. Using both code should indicated to the system that there is already a security threat in the cockpit that someone had deliberately lock other people outside. The reason why one sets of code are given to the pilot and the the other to the cabin crew is because the only scenerio someone inside can do harm to the flight without any resistance is when the other pilot are outside the cockpit. So this allow the other controlling member to immediate regain access to try to save the plane.
So why two sets of hijacks code? This is for situation where hijacker try to hijack the planes while one pilot is outside and then try to threaten to kill him and the purser and demand them to release the emergency code. So as long as one person provide the false information and provide the hijack code, and as long as one sets of hijack code were entered, the door will be permanently lock. This way, at least we know that as long as one crew member can see the big picture and one crew Member the hijack code (without the other crew knowing if it is hijacks code or not), and this allow one crew to lock the cockpit door permanently during hijack scenario. (Note: I am not trying to imply someone is going to do the right think but the chances of at least one of the two members will see the big picture and do the right think to give the hijack code to disable the cockpit door is high). The only way to resume normal operations is a system reset from the inside of the cockpit. And NO, the system needs to design in such a way so that the person can not enter the hijacks code while the door is open. This prevent someone inside to open the door, enter the hijack code,then close the door to lock out the user, hijacks codes can only be enter when the door is already in closed position.
So just a simple door logic changes like this will have prevented Various kind of scenario from happening.