Mayday | The Single Deadliest Air Crash | Flight 12 (1985)
On 12 August 1985, Japan Airlines 123 departs from Haneda Airport on a routine flight to Osaka.
1985-08-12 19:00:00 - Wonder
But when an improperly installed doubler plate causes rapid decompression, the plane crashes into Mount Takamagahara, killing 520 people and becoming the deadliest single-aircraft accident in aviation history.