SAE 2015 International Conference on Icing of Aircraft, Engines, and Structures

June 22-25, 2015

Prague, Czech Republic

Hotel International Prague

FAA 14 CFR Part 25 Rulemaking for Flight in Icing

Robert Hettman Robert Hettman
Aerospace Engineer
FAA Transport Standards Staff
Federal Aviation Administration (FAA)

On November 4, 2014, the Federal Aviation Administration published a final rule to expand the environmental icing conditions used for certification of new airplanes and engines that have been most affected by flight in icing. The expanded icing environment includes freezing drizzle and freezing rain, commonly referred to as supercooled large drops, or SLD; as well as glaciated and mixed phase icing conditions commonly referred to as ice crystals. This presentation provides an overview of the rulemaking package, the new and revised airworthiness standards, and the associated guidance materials that may be used to show compliance.