Germanwings Flight 9525

Germanwings Flight 9525 (4U9525/GWI18G) was a scheduled international passenger flight from Barcelona–El Prat Airport in Spain to Düsseldorf Airport in Germany. The flight was operated by Germanwings, a low-cost carrier owned by the German airline Lufthansa. On 24 March 2015, the aircraft, an Airbus A320-211, crashed 100 kilometres (62 mi) north-west of Nice in the French Alps after a constant descent that began one minute after the last routine contact with air traffic control and shortly after it had reached its assigned cruising altitude. All 144 passengers and six crew members were killed. It was Germanwings' first fatal crash in the 18-year history of the company.

The crash was deliberately caused by the co-pilot Andreas Lubitz, who had previously been treated for suicidal tendencies and been declared "unfit to work" by a doctor. Lubitz kept this information from his employer and reported for duty. During the flight, he locked the pilot out of the cockpit before initiating a descent that caused the aircraft to crash into a mountain.