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Old 10th Feb 2013, 15:35
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B737900er
 
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When to de-ice/Anti-ice?

Hi all,

Not having much experience in cold weather ops (none infact) im asking my self, given different scenarios would I de-ice or anti-ice.

De-icing doesnt seem to hard to understand, if the wing is contaminated then de-ice is needed and there isn't a hold over time, except LOUT if that counts.

So taking a Metar from a UK airfield
12013kt 4900 -SN OCV003 01/01 Q0993

Scenario A : Using the Metar above, the snow melts upon contact, do you Anti-ice?
Scenario B: Using similar conditions but instead its raining. Would you apply any fluid?

I personally would for Scenario A and im not sure for Scenario B but at those temperatures icing will occur??

Part II. Are most fluids applied, done in a one part process or two?

I've only arrived at an aircraft where the de-ice has been done by engineering.

Advise is much appreciated.

Thanks
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