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The original was posted on /r/todayilearned by /u/AmountUnlucky9967 on 2024-04-18 20:43:08.

Original Title: TIL Helios 522 was a case of a “Ghost Plane”, the cabin didn’t pressurize and all but one on board passed out from hypoxia. The plane circled in a holding pattern for hours driven by autopilot before flight attendant Andreas Prodromou took over the controls, crashing into a rural hillside.