One of the scenarios, which has been credited as reasonable, is a big fire in the aircraft [1]. In the scenario depicted, "all the busses are pulled", in which

One of the scenarios, which has been credited as reasonable, is a big fire in the aircraft [1]. In the scenario depicted, "all the busses are pulled", in which case the airplane goes silent, then restored one by one, except that because of the fire, restoration hasn't been possible. If that will prove to be the case, I think prevention measures would be quite hard - circuits were silenced. [1]=https://plus.google.com/app/basic/stream/z13cv1gohsmbv5jmy221vrfyiz3vdhbop04 https://plus.google.com/app/basic/stream/z13cv1gohsmbv5jmy22...