On March 8, 2014, a Boeing 777 with 239 people went missing on a flight between Kuala Lumpur and Beijing. As details emerged within hours of the airplane’s last communication with air traffic control, it became clear that Malaysian Airlines 370 (MH370) was lost … literally; no one knew where the airplane went once it disappeared from radar about 40 minutes after takeoff from Kuala Lumpur. Because the Boeing’s transponder also ceased functioning, tracking the airplane by air traffic control became impossible.
Read more: https://www.forbes.com/sites/rmark/2019/03/04/five-years-malaysia-370-disappear/#3b29ffb2c7b9
