Flight tracking data shows the Boeing 777-300ER plunged 1,800 metres in just a few minutes, with passengers saying it happened, so suddenly there was no time for many to fasten their seat belts.

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Flight tracking data shows the Boeing 777-300ER plunged 1,800 metres in just a few minutes, with passengers saying it happened, so suddenly there was no time for many to fasten their seat belts.