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https://www.bbc.com/news/business-50293927
>John Barnett says tests suggest up to a quarter of the oxygen systems could be faulty and might not work when needed.
>He also claimed faulty parts were deliberately fitted to planes on the production line at one Boeing factory.
>Mr Barnett says his attempts to have the matter looked at further were stonewalled by Boeing managers. In 2017, he complained to the US regulator, the FAA, that no action had been taken to address the problem. The FAA, however, said it could not substantiate that claim, because Boeing had indicated it was working on the issue at the time.
>John Barnett says tests suggest up to a quarter of the oxygen systems could be faulty and might not work when needed.
>He also claimed faulty parts were deliberately fitted to planes on the production line at one Boeing factory.
>Mr Barnett says his attempts to have the matter looked at further were stonewalled by Boeing managers. In 2017, he complained to the US regulator, the FAA, that no action had been taken to address the problem. The FAA, however, said it could not substantiate that claim, because Boeing had indicated it was working on the issue at the time.
