But despite all this, sometimes aircraft do disappear. Although it does not seem that long ago, Malaysia MH370 disappeared on March 8, 2014. ... Despite air and sea searches of vast stretches of the Indian Ocean, the aircraft and its passengers has never been found.

Did they ever find out what happened to Malaysia Flight 370?

In July 2018 the Malaysian government issued its final report on flight 370's disappearance. Mechanical malfunction was deemed extremely unlikely, and “the change in flight path likely resulted from manual inputs,” but the investigators could not determine why flight 370 disappeared.

How has MH370 not been found?

The pilot in command of missing Malaysian Airlines flight MH370 deliberately made a series of turns to avoid detection before flying the doomed plane into the southern Indian Ocean, according to research that relies on new aircraft tracking technology.