Fact check
Is it true: Helios Airways 522 cabin decompression / ghost flight (Aug 14 2005)?
Yes — this is confirmed.
Cypriot AAIASB report (2006) confirmed pressurization mode selector was left in MANUAL after a maintenance check, causing progressive cabin decompression. Crew misdiagnosed the warning horn and became hypoxic. Aircraft flew on autopilot to Athens while HAF F-16s intercepted and found the cockpit unresponsive. Flight attendant Andreas Prodromou (trained pilot) briefly attempted control before fuel exhaustion. 121 killed near Grammatiko, Greece.
The claim
Helios Airways Flight 522, a Boeing 737-300 registration 5B-DBY, crashed near Grammatiko, Greece, on 14 August 2005, killing all 121 aboard. The pressurization mode selector had been left in MANUAL du
Key evidence
Pressurization selector confirmed in MANUAL at impact
Ghost-Flight Pattern Consistent With Hypoxia Physics
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