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Old 14th Jun 2016, 19:02
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sudden Winds
 
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B737 Engine anti ice below -40ºC SAT
Hi there,

Today during recurrent training this old discussion came up.
Boeing instructs to not use engine anti ice during climb and cruise with OAT or SAT below -40ºC. I heard a good reason once that said a warm cowl lip would melt and turn into water ice pellets that would otherwise bounce harmlessly out of the way. What do you guys have to say about that? Ever heard or read different?

Thanks.
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