Re: Do fuel valves ice jam due to water in fuel?

From: (Patrick Roberts)
Organization: Al Bundy for President
Date:         07 Sep 96 17:09:07 
References:   1 2
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  or MIME structure (MRTONKA) writes:

>>Has anyone heard of cases where motor operated fuel valves (ball, gate or
>>butterfly) jammed internally due to ice caused by excessive water in the
>>fuel (JP4 or kerosene) freezing during flight at high altitude?

Yes the fuel tank selector valves on the DC-8-60 series will do this
on the ground in extreme temps. It is a 3 way ball valve.