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Currently Playing: Ghost plane | Why was this plane SILENT for hours before crashing? | Helios 522

Subscribe if you would like to see more weekly air crash videos! Why was this Helios airways 737 silent for over 2 hours before crashing into the Greek countryside, killing all on board? And who was the mystery person spotted in the cockpit by the fighter pilots who intercepted the aircraft? Was this terrorism, or something else? This episode explores a crash which had been waiting to happen for years. Thankfully, the recommendations made by the Greek Air Accident Investigation Board as a result of the crash have mostly been followed by the aviation industry since. To date, there has never been another accident of its kind (although at times, things have come close: https://www.bbc.com/news/world-asia-india-45584300) This video uses findings from the official accident report to recreate the series of events that led to the crash. Background music all licensed through Epidemic Sound. Photographs All from official accident report, except this photo By Alan Lebeda - http://www.airliners.net/photo/Helios-Airways/Boeing-737-31S/0886316/L/, GFDL 1.2, https://commons.wikimedia.org/w/index.php?curid=17079552 Aircraft simulation - IXEG B737 Helios livery for 737-300 - User Eastern@JFK (Threshold Forums): https://forum.thresholdx.net/files/file/207-ixeg-737-helios-5b-dby/ https://www.avweb.com/flight-safety/c... Helios 522 accident report (English translation): http://www.aaiu.ie/sites/default/files/Hellenic%20Republic%20Accident%20Helios%20Airways%20B737-31S%20HCY522%20Grammatiko%20Hellas%202005-085-14.pdf 00:00 Intro 00:51 Boarding and takeoff 02:18 An alarm sounds 05:00 Fighters intercept 6:30 The Investigation 12:30 Who was in the cockpit? 14:20 Safety reccommendations