AAIB investigation to Airbus A340-642, G-VGAS

Warning of excess cabin altitude during the cruise, En route from London Heathrow Airport to John F. Kennedy International Airport, New York City, USA, 23 February 2017.


During the cruise at FL 400, the crew received a warning of excessive cabin altitude. They descended and continued to destination. At the same time as the warning of excessive cabin altitude, a fault was recorded in a Cabin Pressure Controller and it was suspected that this caused the cabin outflow valves to open allowing the cabin altitude to increase.

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Airbus A340-642, G-VGAS 09-17

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Glossary of abbreviations

Published 14 September 2017