Jose wrote in
:

If the wings and fuel are cold soaked enough any
moisture contacting the wing may form frozen contamination. This
forms on the upper surfaces after landing especially if you have alot
of fuel remaining.

What would prevent this from happening in flight? (n.b. in my case
the ambient flight temps were just below freezing - radiative cooling
may have lowered the wing temp =some= more, but a =lot= more?)


Well, nothng if it's wet enough outside, but it's unlikely you're going to
get a low altitude airplane and it's fuel cold enough to do it in flight.
It happens often on airliners if they've been at altitude for extended
periods and they get th efuel down to low temps and then descend into
moisture.


Bertie