[LINK] Cyber hijack of MH370?

[Jim Birch]

And this took place without the crew noticing and reporting an issue or
switching to manual and flying back?  Not possible.

Commercial airliners have multiple independent control and comms systems
for pretty obvious reasons.

In this case the ACARS which provides comms between plane, airline company
and ground control was disabled, as was the plane's status transponder 14
minutes later.  This more-or-less rules out some kind of catastropic
event.  The ACARS runs when the plane is powered up.  It doesn't have an
off switch and to disable it you would need to select the correct circuit
breaker out of hundreds in the cockpit.  Apart from physical access to the
cockpit, you would also need systems knowledge for that model of plane.

What is known is consistent with a reasonably well planned inside job or,
maybe, a very sophisticated hijack.  Pilots have flipped out before.  No
one credible has claimed responsibility for a hijack.

Tech background article:
http://www.nydailynews.com/news/world/wanted-malaysia-airlines-flight-gird-aviation-expert-article-1.1723111

- Jim