Fly by Wire (FBW) 
Plane crashes

[Fly by wire is a secret that would destroy 911 'flown by terrorists' bullshit, for one.]

[2014 April] Missing plane mystery solved?

You Can't Handle The Truth! Boeing's Secret Patent  Following the review of the both the patent and the timeline, we have come to the conclusion that the technology needed to protect the flight control systems from being taken over remotely or jammed remotely were not yet implemented, thus leaving any Boeing 777 or later aircraft utilizing Fly By Wire Technology vulnerable to a hacker.