"Bob Moore" wrote in message
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[...]
I'm putting my money on wrong fuel (freeze point) for the existing OAT.

I think the climb rate theory has been sufficiently disputed. However, I
find the thought that outside air temperature at FL410 might be an issue,
when (presumably) the airplane was being operated safely at a lower altitude
AT THE EXACT SAME TEMPERATURE, pretty silly too.

I don't know the exact altitude of the tropopause on the day of the
accident. But it was likely in the neighborhood of FL300 give or take a few
thousand feet. From the tropopause all the way up to FL410 (and higher),
the temperature would have been a relatively constant -57 C.

Sorry...that theory doesn't pass the sniff test any more than the "overtemp
due to climb" theory does. Not unless your theory is claiming that the
altitude the pilots climbed to was entirely irrelevant, and that the
accident would have happened regardless (I would find that to be a
reasonable inclusion in the theory, though it would beg the question as to
why other planes didn't have similar troubles that day, since the fuel
presumably sold to a wide variety of aircraft was apparently not suitable
for high-altitude flight).

Pete