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What pressure aircraft cabin is maintaining when it is flying at 41000 foot above sea level.?

April 26, 2017aircraft cabin cars flying foot maintaining pressure Transportation

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What pressure aircraft cabin is maintaining when it is flying at 41000 foot above sea level.?

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The outflow valve is constantly being positioned to maintain cabin pressure as close to sea level as practical, without exceeding a cabin-to-outside pressure differential of 8.60 psi. At a cruising altitude of 39,000 feet (FL 390), cabin will be pressurized to an altitude of ~ 6,900 feet.