AAIB investigation to Boeing 777-236, G-YMMU

Fumes on the flight deck, on departure from London Heathrow Airport, 3 July 2019.

• From: Air Accidents Investigation Branch
• Published: 13 December 2019

• Category: Commercial - fixed wing
• Report type: Bulletin - Correspondence investigation
• Date of occurrence: 3 July 2019
• Aircraft type: Boeing 777-236
• Location: On departure from London Heathrow Airport
• Registration: G-YMMU

Summary:

Shortly after takeoff from London Heathrow the pilots smelt fumes on the flight deck. They donned oxygen masks, carried out the appropriate checklist and returned to Heathrow where the aircraft landed without further incident.

Extensive engineering investigation was carried out and several components were changed, but the source of the fumes was not found.

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Boeing 777-236, G-YMMU 12-2019

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Glossary of abbreviations

Published 13 December 2019