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FAA NPRM: Removal of regulations allowing for polished frost on wings of airplan
7 May 2008

The U.S. FAA issued a Notice of proposed rulemaking (NPRM), proposing to remove provisions in its regulations that allow for operations with ‘polished frost’ (i.e., frost polished to make it smooth) on the wings of airplanes operated under parts 125, 135, and certain airplanes operated under part 91. The rule would increase safety by not allowing operations with polished frost, which the FAA has determined increases the risk of unsafe flight. (FAA)