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S1:E10 Helios Airways flight 522 - WHAT happened?!
First Aired: October 31, 2020
A pressurization switch left in the wrong position slowly incapacitates everyone aboard Helios Airways Flight 522, which flies on autopilot until its fuel runs out. Petter Hörnfeldt reconstructs the chain of missed warnings and creeping hypoxia that doomed the Boeing 737 near Athens.
