Or is it forever going to be a catch 22: if you can securely lock the cabin to prevent a hijacking, whoever locks themselves in can crash the plane? :/
>Alone in the cockpit after Sondenheimer left to use the bathroom, Lubitz immediately put his plan into action. He moved the cockpit-door toggle switch, located on a pedestal to the left of his seat, from “normal” to “locked” position, disabling Sondenheimer's emergency access code. Moments later, he reached forward and turned the dial on the automatic pilot to bring the plane down to 100 feet. Just before 10:31 A.M., after crossing the French coast near Toulon, the aircraft left its cruising altitude and began dropping at a rate of 3,500 feet per minute, or 58 feet per second.
>At 10:39, Sondenheimer called for a flight attendant to bring him a crowbar hidden in the back of the plane. Grabbing the steel rod, the pilot began smashing the door, then trying to pry and bend it open. The plane had dropped to below 10,000 feet, the snow-encrusted Alps looming closer. Inside the cockpit, Lubitz placed an oxygen mask over his face. “Open this fucking door!” Sondenheimer screamed as passengers stared in bewilderment and mounting terror. Lubitz breathed calmly. At 10:40, an alarm went off: “TERRAIN, TERRAIN! PULL UP, PULL UP!” The plane dipped to 7,000 feet. The alarm signaled a shrill “ping-ping-ping,” a warning of approaching ground. Sixty seconds later, the Airbus's right wing clipped the mountainside at 5,000 feet. The only further sounds picked up by the voice recorder were alarms and screams. Moments later, the jet slammed into the mountain at 403 miles per hour.
https://www.gq.com/story/germanwings-flight-9525-final-momen...