Larry Dighera wrote:
On Wed, 9 Jan 2008 19:43:17 +0000 (UTC), Bertie the Bunyip
wrote in :

The rudder and the stab are both stil physically ( hydraulics) attached to
the flight controls.

Unless there are hydraulic cylinders attached to the flight controls
to activate the rudder and elevator (doubtful), there is going to be a
requirement for hydrolytic pressure from a pump to activate those
control surfaces. If that hydraulic pump can be controlled by the
hypothetical hacker through the computer system, vulnerability exists,
if the Dreamliner systems are similarly engineered.

Never seen a system where the hydraulic pump was controlled; valves, yes,
pumps, no.

What would one "control"?

--
Jim Pennino

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