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The FAA sent a letter to the Aerospace Industries Association (AIA) on 21 November 2016 requesting a retasking of the Engine Icing Working Group (EIWG). The retasking request was for the EIWG to provide recommendations for developing guidance material to assist applicants with showing compliance to 14 CFR §33.68. The EIWG responded to the FAA via a letter sent by the Aerospace Industries Association on 1 June 2017 and agreed to the tasks proposed by the FAA, which are discussed in this document.

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