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Anti-Ice Systems, And How To Use Them

Flight in known icing is one of the challenges of flying equipped aircraft. The systems and their limitations is another.

** FAA Administrator Randy Babbitt**
Gemini Sparkle

Key Takeaways:

  • The article details various anti-icing systems for Flight-Into-Known-Icing (FIKI) approved aircraft, emphasizing prevention over ice removal across critical components like pitot/static tubes, stall warning systems, windshields, propellers, and engines.
  • Common anti-icing methods include electric heating elements, hot engine bleed air, and the TKS (Tecalemit, Kilfrost, Sheepbridge Stokes) fluid-based system, which dispenses ethylene glycol onto surfaces.
  • The TKS system is a popular anti-icing solution, providing protection on multiple surfaces, but its effectiveness is limited by the finite supply of fluid.
  • Operating in known icing conditions requires diligent monitoring and adherence to aircraft flight manual (AFM) guidance, as anti-icing systems are designed to provide time for pilots to exit icing conditions, not to permit indefinite flight within them.
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Some subjects in aviation are covered during flight training in an academic sense, but their practical application presents challenges. For example, most of what I was taught about SIDs and STARs involved writing, “No SID/STAR” in the flight plan form’s remarks section. In a similar vein, most of what I learned about in-flight icing while bombing around in a Skyhawk was avoidance: Recognize the symptoms and find the fastest way out.

Once I transitioned to aircraft approved for flight-in-known-icing (FIKI), the opportunities increased as much as the flight planning. Additional systems needed to be checked and when I’m in the thick of it, the amount of monitoring substantially increases. In other words, there’s no free lunch.

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