Aviation English
Fueling Deicing

What is Second fluid?

Second fluid A protective de-icing or anti-icing fluid applied after first fluid, designed to prevent further accumulation of ice or snow on aircraft surfaces.

Source: ICAO Doc 9432, FAA PCG

How is “Second fluid” Used in Practice?

Ground, apply second fluid evenly after removal of contaminants with first fluid as per winter operations protocol.

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 Second fluid?

A protective de-icing or anti-icing fluid applied after first fluid, designed to prevent further accumulation of ice or snow on aircraft surfaces.

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