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Jim S wrote:
<... You do not have to have more than one level of
redundancy to basically eliminate any chance of total failure of the system with
failures in the 1000 hour range ...>
You might want to talk to the crew of
that 757 or L1011 or whatever it was that crashed in Souix City(?) a few years
back because it lost ONE of THREE engines and immediately went
ballistic.
The devil made me say that :o) ... Jim S.
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As a matter of fact , I have talked to Captain who
servived this ordeal with great cockpit resource management. It was a terrible
design that triggered this whole episode because all hydraulic lines were
bundled. Reduncancy was not a factor here. Be the way, it was a GE fan failure
that was not contained! I think the devil made me say that
also:>)
Bernie Kerr, 33 years as a gas turbine design and
systems engineer at Pratt
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