Greece's Air Accident Investigation and Aviation Safety Board said yesterday that the August 2005 Helios Airlines 737-300 crash was caused primarily by the pilots' "nonrecognition" that the cabin pressurization mode selector was switched to "manual" and their subsequent misreading of warning signs. The errors led to the flightcrew's incapacitation "due to hypoxia" when the aircraft failed to pressurize on ascent. It flew for more than 90 min. on autopilot before its fuel was exhausted and ...

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