givemewings
On all our aircrafts including 777 we carry 2 ( fwd door and aft door) they are stow in the life raft stowage ie out of sight of passengers . The also have a guard to prevent it being accidently switch on by nosey curious passengers. The only way to switch it on is to take it out of its stowage which will enable the gaurd to expose the on position of the switch therefore enabling to be manually switch on. It can also be switch on by it's water switch on contact with water. Other airlines (malayaian included) may or may not carry them but ours does.