- Air Accidents Investigation Branch
- 14 September 2017
- Date of occurrence:
- 23 February 2017
- Aircraft category:
- Commercial - fixed wing
- Report type:
- Bulletin - Correspondence investigation
- Aircraft type:
- Airbus A340-642
- En route from London Heathrow to JFK
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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Published: 14 September 2017
Date of occurrence: 23 February 2017