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Long Haul

ドリフトダウン手順

A contingency descent profile followed after an engine failure at cruise altitude to achieve the aircraft’s new single-engine ceiling while maintaining obstacle clearance.

Quick answer: A contingency descent profile followed after an engine failure at cruise altitude to achieve the aircraft’s new single-engine ceiling while maintaining obstacle clearance.

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Quick answer

A contingency descent profile followed after an engine failure at cruise altitude to achieve the aircraft’s new single-engine ceiling while maintaining obstacle clearance.

Why it matters

ドリフトダウン手順 matters because it supports clear communication in Long Haul contexts for Pilots, Air Traffic Controllers, and Cabin Crew. It also connects to aviation training and exam language such as ICAO Level 4, ICAO Level 5, ICAO Level 6, and EASA FCL.055.

Editorial context

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Questions and answers

Questions and answers

What is ドリフトダウン手順?

In this glossary, ドリフトダウン手順 refers to: A contingency descent profile followed after an engine failure at cruise altitude to achieve the aircraft’s new single-engine ceiling while maintaining obstacle clearance.

How is ドリフトダウン手順 used in aviation?

In aviation communication, this term appears in contexts such as: "メイデー、エンジン1基停止、フライトレベル370からドリフトダウン手順を開始、障害物クリアランスを確保しつつドリフトダウンレベルまで降下します。"

Why does ドリフトダウン手順 matter in aviation?

ドリフトダウン手順 matters because it supports clear communication in Long Haul contexts for Pilots, Air Traffic Controllers, and Cabin Crew. It also connects to aviation training and exam language such as ICAO Level 4, ICAO Level 5, ICAO Level 6, and EASA FCL.055.

Who uses ドリフトダウン手順?

ドリフトダウン手順 is mainly used by Pilots, Air Traffic Controllers, and Cabin Crew.

What category does ドリフトダウン手順 belong to?

In this glossary, ドリフトダウン手順 is grouped under Long Haul. Related pages in this category explain adjacent procedures, commands and operational concepts.

Where does this definition come from?

This definition is sourced from ICAO Doc 9432, FAA PCG and published by Protermify Aviation as a static aviation reference page.

Definition

A contingency descent profile followed after an engine failure at cruise altitude to achieve the aircraft’s new single-engine ceiling while maintaining obstacle clearance.

Operational example

Mayday, one engine out, commencing Drift Down Procedure from flight level three-seven-zero to maintain obstacle clearance until drift-down level reached.

Localized term

ドリフトダウン手順

Localized example

メイデー、エンジン1基停止、フライトレベル370からドリフトダウン手順を開始、障害物クリアランスを確保しつつドリフトダウンレベルまで降下します。

Definition language

English reference definition

Source

ICAO Doc 9432, FAA PCG

Category

Long Haul

Exam relevance

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

Target audience

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

Related terms

Use the related links below to continue through connected aviation terminology.

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