Investigators are trying to solve the mystery behind what caused the Ukrainian Boeing 737 – 800 NG crash. A total of 176 people were on board the airplane when it crashed shortly after taking off from Tehran’s international airport.

One of the world’s most reliable airplanes the 737 – 800 model is the backbone of Australia’s Qantas fleet.

Aviation Editor at The West Australian Geoffrey Thomas discusses the possibility of the plane experiencing a rare uncontained engine failure.

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