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Most commercial airplanes are designed to withstand air pressures equivalent to those experienced at altitudes up to 40,000 feet. The cabin pressure is usually maintained at a level that is equivalent to that experienced at 6,000-8,000 feet above sea level to ensure the comfort and safety of passengers and crew. The maximum differential pressure between the inside and outside of the aircraft cabin is typically around 9 pounds per square inch (psi).

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1y ago

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