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Old 1st Mar 2010, 23:24
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Mad (Flt) Scientist
 
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caveat: not based on information specific to the type

While its certainly possible that you'll get ice accumulation in the slots between slat and mainplane, another concern would be ice on flaps, if holding in a "non clean" configuration, which can also interfere with flap aerodynamics.

Also, in both cases, any ice may affect the mechanical operation of the devices. Similar considerations against prolonged use of spoilers in icing exist for some types. Not sure if anyone has an explicit prohibition, but extended gear down in icing probably also is unwise - imaging having built up a three inch double horn ice shape on gear legs and tyres...

Basically, aircraft are certified for flight into icing conditions assuming certain operating procedures, and doing other things than anticipated by the OEM may be unwise.
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