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Old Jan 19, 2018 | 8:30 pm
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Dallas49er
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Originally Posted by nachosdelux
The plane gets cold-soaked at altitude, and picks up moisture on the descent. It freezes to the wings. Even though it is in the 50's on the ground, the ice/frost will not melt quickly, and must be removed prior to the next departure. Now you know.
Originally Posted by nachosdelux
planes do not always pick up moisture on the descent (fly through clouds that are high moisture). Or the amount of frost is minimal and melts quickly. Or the frost is not on critical surfaces (leading edge of wings or on tail)
I had this happen to me just once.

I did a MR on a LHR turn for EXP on Christmas Eve, with a Christmas Day return. I sat on the same plane in the same seat for both legs and had to wait on board in LHR for 45 minutes for de-icing.

The captains explanation was the same as nacosdelux's.
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