Aviation English
Fueling Deicing

What is Rime ice?

Rime ice A rough, white, opaque ice that forms rapidly from supercooled water droplets freezing on aircraft surfaces, reducing aerodynamic performance.

Source: ICAO Doc 9432, FAA PCG

How is “Rime ice” Used in Practice?

Tower, aircraft reports rime ice accumulation on propeller blades during climb through cloud layers.

Certification Exam Relevance

ICAO Level 4ICAO Level 5ICAO Level 6EASA FCL.055

Who Needs to Know This Term?

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

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Frequently Asked Questions

What is Rime ice?

A rough, white, opaque ice that forms rapidly from supercooled water droplets freezing on aircraft surfaces, reducing aerodynamic performance.

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