in-flight icing and ATC

Date:         10 Dec 97 04:05:05 
From:         Sjoerd Postma <>
Organization: NLR-VV
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Does anybody know if ATC does have standard procedures for aircraft that
encounter severe icing conditions and need to leave these conditions
immediately? Most time this will not give too much problems (I think),
but what if a stack of several aircraft is situated in severe icing
conditions? Did any thing change after the American Eagle ATR72 accident
near Roselawn in 1994?