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Advisory Circulars (ACs)

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Advisory Circulars (ACs) search results
Number Title Status Office Date
20-197 Turbine Engine and Airframe Sensor Icing Compliance

This advisory circular (AC) describes an acceptable method for demonstrating compliance with title 14, Code of Federal Regulations (14 CFR) 33.28, 33.68, 33.75,33.89, a nd 33.91, concerning mixed phase, ice crystal icing (ICI), and other icingconditions for engine inlet sensors.

Active AIR-625 2025-06-18