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Rear pressure bulkhead: Wikis

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The aft end of the interior of NASA's Boeing 747 Shuttle Carrier Aircraft. The rear pressure bulkhead is the white circular component, and its web-like structure led a humorous NASA technician to add a large stuffed spider to the decor.

The rear pressure bulkhead is a component of all large commercial aircraft. It is an airtight bulkhead located between the cabin and the tailfin. Its purpose is to seal the rear of the plane and thus maintain cabin pressure, and as such it is a vital part of the aircraft.

Japan Airlines Flight 123 crashed after a catastrophic failure of the rear pressure bulkhead. The failure occurred due to faulty repair of the bulkhead, when a double row of rivets was replaced by a much weaker single row. Failure of the bulkhead damaged hydraulic pipes passing through.

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