AAIB investigation to Boeing 767-332ER, N1608
Cabin altitude increased to 15,900 ft, London Heathrow Airport, 13 August 2017.
Summary:
On departing London Heathrow Airport, the cabin altitude reached 15,900 ft. The crew donned their oxygen masks, commenced an immediate descent and returned to Heathrow. The cause of the cabin failing to maintain the required pressure could not be established.
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Published 13 September 2018