Aviation English
Advanced ATC

What is Derated Thrust?

Derated Thrust Engine rated for lower maximum take-off thrust than certification limit, permanently reducing stress and maintenance costs.

Source: ICAO Doc 9432, FAA PCG

How is “Derated Thrust” Used in Practice?

This engine variant operates at derated thrust twelve percent below nominal, extending hot-section life on each cycle.

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 Derated Thrust?

Engine rated for lower maximum take-off thrust than certification limit, permanently reducing stress and maintenance costs.

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