> that is alarming, i can imagine the number of attacks that could
> be launched through such a connection.  massive noise or voltage
> spikes being the most obvious.  somehow i doubt this bus is
> isolated from the rest of the aircraft's power (not like a modems

One of a series of programs about the NTSB that looked at the
cause of individual air crashes was about a packed plane to Paris
that went down in flames after leaving NY a few years ago. For
some length of time the cockpit crew reported that the cockpit had
filled with smoke from an unknown cause and that systems were
failing. Eventually radio ontact was lost after the crew passed out
from smoke inhalation and the next sighting of the plane was a
fireball off the coast. It was determined that the power supply to
passengers' screens (a new feature) was not fused and connected
to the plane's vital wiring. A fault caused a fire that spread undetected
next to the plane's outer skin until the inevitable happened. After that
incident the NTSB required, and reportedly got, a wiring overhaul,
which included separating convenience wiring from functional

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