I don't think I'm the first. and it's a required procedure at other airlines, not that it matters, but it should be at every airline since ice doesn't know what airline you're flying for...
>-40 sat, is where moisture can exists. colder means dry.
<10*c because there is a 10*c temp drop in the intake bringing the temp down to 0*c. it's tat in flight.
don't forget moisture must be present.
what part of this do you disagree with?
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