Re: Peruvian 757 crash

From:         s_odle@earthlink.net (Scott Odle)
Organization: Earthlink Network, Inc.
Date:         08 Nov 96 05:24:23 
References:   1 2 3
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In article <airliners.1996.2284@ohare.Chicago.COM>, kls@ohare.Chicago.COM
says...
>
>>>This sounds like it COULD be the ultimate glass-cockpit horror story:
>>>they suffered an electrical or electronic failure that was so complete
>>>that it left the plane uncontrollable.
>
>>Under the FARs the above should not be possible.
>
>Huh?  At best, assuming the design meets the FARs as certified, the
>above should be exceedingly unlikely.  That's not the same as "not
>possible."
>

Unless there is direct evidence to the contrary, you have to assume it met the
certification requirements.  And if it did, the design of the aircraft along
with the requirements of FAR 25  would lead anyone who is involved in this type
of work to conclude that saying "exceeding unlikely" is a understatement.  To
lose everything that leaves the aircraft uncontrollable you would need multiple
unrelated failures to occur, in certification terms it would have a probabilty
of less that 10-9 (probably alot less).  Of course nothing is impossible, but
to base conclusion on the small amount of words transmitted by the pilot is
speculation at best, unless there is someone out there was was capable of
reading his mind at the time of the accident.