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Two 737 planes crash within several years of each other. The similarities are striking but investigators are stumped. It takes a third near miss, for investigators to get the break they need and crack the case.

Mayday: Air Disaster – From Season 4 Episode 5 “Hidden Danger”: United Airlines 585 USAir 585

Around the globe, more than six billion people have traveled on a Boeing 737. They’re the backbone of the aviation industry. But in 1991, something happened onboard a 737 that sent shudders through the world of aviation.

Moments from landing, United Airlines 585 starts spinning out of control and falls out of the sky at 450 kilometers per hour. Everyone on board is killed. In ten violent seconds, the crash site has become one of the most mysterious air disasters in aviation history.

Almost two years after the crash, the NTSB had studied the crew, the weather, the rudder, and thousands of other pieces of evidence – but they can’t solve the mystery.

Mayday: Air Disaster is a dramatic non-fiction series that investigates high-profile air disasters to uncover how and why they happened. Mayday: Air Disaster follows survivors, family members of crash victims and transportation safety investigators as they piece together the evidence of the causes of major accidents. So climb into the cockpit for an experience you won’t soon forget.