After Malaysia Airlines flight 370 went missing in 2014, a number of theories were proposed. One of the most commonly cited explanations is pilot suicide. In 2016 it was reported that Captain Zaharie Ahmad Shah, on his home flight simulator, had flown over the southern Indian Ocean less than a month before the plane vanished. The simulated flight closely matched the missing aircraft’s final path. Claims of domestic issues in Shah’s life also lent credence to the notion of a premeditated pilot-induced mass murder-suicide.
Other theories include hijacking, fire, and mechanic failure. Some have also proposed that the plane was shot down. However, none of these theories have been conclusively proven.