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- 7 Jul 2007
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- 1,412
No.
Air is supplied to the air conditioning packs from the engine. You wouldn't need to climb. You could just turn off the packs or manually open the outflow valve and raise cabin altitude. Turning off the packs and opening the outflow valve would be fast. The cabin altitude would raise, the masks would drop and the passengers would get about 15 minutes air from the drop downs. (Those that bothered dropping). At a cabin altitude of less than 25,000 feet no one on that plane would be conscious.
Why would you even bother doing that, you are locked in no one can get to you if you are going to kill everyone on board you don't need to make them pass out and die. You just point it at the floor. The only person he would need to subdue would be the other pilot/s unless they planned it together.
Also, from what I have heard, there isn't anyway to manually turn off the cabin pressurisation in a 777 if you are at altitude.