Why was this Helios airways 737 silent for over 2 hours before crashing into the Greek countryside, killing all on board? And ...

Helios Flight 522 became known as the "ghost plane" after it flew silently on autopilot for hours before crashing. In this video, I break down how a simple maintenance error led to a loss of cabin ...

#42. Helios Airways Flight 522: 121 fatalities Nov 7, 2016 Nov 7, 2016Updated Dec 30, 2016 Location: Grammatikos, Greece Date: August 14, 2005 Others Injured: 0 ...

A lack of oxygen in the cabin incapacitated Helios Airways Flight 522's crew, and the plane eventually crashed into a mountain after running out of fuel.

Minutes later, Helios Airways flight 522, flying on autopilot, crashed into the side of a hill north of Athens, killing all 121 people aboard in the worst air crash in Greek history.

#42. Helios Airways Flight 522: 121 fatalities Nov 7, 2016 Nov 7, 2016Updated Dec 30, 2016 0 Location: Grammatikos, Greece Date: August 14, 2005 Others Injured: 0 ...

#42. Helios Airways Flight 522: 121 fatalities Nov 7, 2016 Nov 7, 2016Updated Dec 30, 2016 Location: Grammatikos, Greece Date: August 14, 2005 Others Injured: 0 ...

A lack of oxygen in the cabin incapacitated Helios Airways Flight 522's crew, and the plane eventually crashed into a mountain after running out of fuel.

#42. Helios Airways Flight 522: 121 fatalities Nov 7, 2016 Nov 7, 2016Updated Dec 30, 2016 0 Location: Grammatikos, Greece Date: August 14, 2005 Others Injured: 0 ...