In article ,
says...


Greg Farris writes:

That is demonstrably false!
There are several documented cases of mechanical failures of throttle
linkages in airplanes, and when it happens it is a genuine,
life-threatening emergency.

As I've said, failure modes are very limited for mechanical throttles,
and generally they are not catastrophic. A failure of a linkage, for
example, may deprive you of throttle control, but it is much less
likely to peg the throttle at idle or full power (although this
depends on design).

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As I've said - as I've said - as I've said. . .
You are simply, demonstrably, completely WRONG!
It's easy to prove. Databases exist on these accidents, and they prove you
completely wrong.

"As I've said", is a meaningless phrase for someone who lives in complete
ignorance of the subject.

The USUAL failure mode for mechanical linkages results in complete, or
nearly complete power loss. There are dozens or accidents in the database
for this failure mode - several of them fatal.

I am not aware of accidents cause by software failure of Fadecs - perhaps
there have been - but these are certainly rare compared with mechanical
failures of linkages.

The databases contain thousands of accidents directly attributable to
mechanical failures in airplanes. I am not aware of ANY accident in which
software failure of a system was causal. There are plently of situations
where crew have misinterpreted situations, but I cannot think of any
accident in which a software failure has created an "unrecoverable"
situation, as has been the case in hundreds of mechanical failure
accidents.