10 Wonderful mysteries about airplanes that you probably did not know about

Lock door for a plane called Cooper Vane

It was actually added to the planes after an innovative hijacking. The incident was that a hijacker named Den Cooper took a passenger plane and demanded a lot of money in exchange for the release of passengers. After he paid the money, he jumped out using the umbrella. Since then, a zinc lock has been installed on Boeing and Airbus aircraft, which prevents it from opening its doors.