WATCH: How to Lock & Unlock an Airbus A320 Cockpit Door

How To Lock and Unlock Airbus A320 Cockpit Door – Description and ProceduresThe video is propriety of: Airbus Reinforced Cockpit Door Description And Procedure Produced by Group Master Image Directed by Bertrand Sirven Airbus GDCM / SCM12 / STSV / MASTER IMAGE September 20022015-03-26T03:43:22.000Z

According to French prosecutor Brice Robin, Germanwings pilot Andrea Lubitz deliberately locked Captain Patrick Sonderheimer out of the cockpit of their plane. Then, Lubitz deliberately crashed the aircraft into the French Alps, killing all 150 on board.

The plane’s blackbox recorder shows that Sonderheimer couldn’t get back in the cockpit after going to the bathroom. Above you can see what Lubitz would have to have done to keep Sonderheimer out of the cockpit. Even after the captain entered the seven-digit code to open the door, it doesn’t open for five minutes as part of its programing.