Aviation English
Flight Phase

What is Acceleration altitude?

Acceleration altitude The specified altitude after take-off at which an aircraft transitions from take-off power and climb profile to acceleration and flap retraction, as defined in the departure procedure.

Source: ICAO Doc 9432, FAA PCG

How is “Acceleration altitude” Used in Practice?

At acceleration altitude, increase speed, retract flaps on schedule, and reduce to climb power.

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 Acceleration altitude?

The specified altitude after take-off at which an aircraft transitions from take-off power and climb profile to acceleration and flap retraction, as defined in the departure procedure.

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