Aviation English
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What is Alternate procedure required?

Alternate procedure required Standard operating sequence unavailable; crew must follow officially published alternate or contingency checklist.

Source: ICAO Doc 9432, FAA PCG

How is “Alternate procedure required” Used in Practice?

Tower, ARROW 86, runway closed; alternate departure via Charlie required.

Certification Exam Relevance

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

Who Needs to Know This Term?

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

Related Aviation English Terms

maintenance procedureoperational procedureInterim Procedural RevisionAlternate-airport fuel

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Frequently Asked Questions

What is Alternate procedure required?

Standard operating sequence unavailable; crew must follow officially published alternate or contingency checklist.

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