Aviation English
Advanced ATC

What is Alpha-Floor Protection?

Alpha-Floor Protection Autothrust safeguard that commands maximum thrust if angle-of-attack approaches stall, preventing loss of lift.

Source: ICAO Doc 9432, FAA PCG

How is “Alpha-Floor Protection” Used in Practice?

Alpha-floor protection triggered; autothrust advanced to TOGA, aircraft recovering from high angle-of-attack in gusty climb.

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 Alpha-Floor Protection?

Autothrust safeguard that commands maximum thrust if angle-of-attack approaches stall, preventing loss of lift.

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