Aviation English
Flight Phase

What is Transition level?

Transition level The lowest flight level available for use above the transition altitude. Aircraft climbing through the transition altitude use the transition level to set standard pressure.

Source: ICAO Doc 9432, FAA PCG

How is “Transition level” Used in Practice?

Expect transition level FL120; set standard pressure passing transition altitude.

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 Transition level?

The lowest flight level available for use above the transition altitude. Aircraft climbing through the transition altitude use the transition level to set standard pressure.

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