In 2015, SAE published AS5562, “Ice and Rain Minimum Qualification Standards for Pitot and Pitot-static Probes”. Subsequently, this document was incorporated into a significant revision to FAA TSO-C16a and EASA ETSO-C16. This was the first time that probe minimum performance standards required testing to high ice water content (HIWC) and mixed phase conditions as well as heavy rain. Additional changes relative to the previous standards included a requirement to test at altitude (for fully glaciated conditions), testing at higher speed and colder temperatures and quantitative pass/fail criteria. In summary, testing to the new standards introduced significant challenges relative to the previous standards.
Given the extensive changes, there have been a number of questions and challenges that have arisen by those in the industry that have applied AS5562 to their probe development programs over the past four years. Many of these have been addressed on an individual basis and it is recognized that there is a need for the broader community to have access to this information. The purpose of this paper is to provide this information with the intent of clarifying AS5562 and encouraging consistent usage across the industry.
Brian D. Matheis, Catherine Clark, Mac Whalen
Collins Aerospace, National Research Council Canada
International Conference on Icing of Aircraft, Engines, and Structures