Originally Posted by kidicarus5897

I disagree with turning on the engine ICE in the air without any mention in any manual, however I do agree that at times it may be necessary. The fact that it is done at other airlines does not help those of us at this airline that are unaware of that fact, but it does imply that it might be something we should be doing. I have never heard of lip ice being a problem so I guess that is why we don't have a procedure. The question I have is why? Physics-wise at least. So you are telling me that you have turned on the engine lip air in flight based on the temp being close to 10*c. Does anyone else do that on a regular basis?