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Horrifying video footage shows the moments after a plane's engine blew apart as it flew over the Atlantic .
In the images posted online by a passenger, a thick cable can be seen flapping in the air after the engine disintegrated and the pilot declared a mayday.
Passengers reacted with horror when the engine of the Air France jet from Paris to the USA failed, forcing the aircraft carrying 520 passengers into an emergency landing.
Travellers described how everything seemed normal until they heard a "loud thud and a lot of vibration".
Ground crews were left to "pick up pieces of the plane from the runway", one passenger added.