An official report on the world’s deadliest aviation accident in a decade, seen by CNN, has answered one key question – but raised others.

In the commercial airline universe, the chances of a simultaneous dual-engine failure at takeoff are so low approximately 1 in 140 billion flight hours that the very situation appears to be nearly impossible.

Crash investigators, fresh from combing through the wreckage of Air India Flight AI171, have released a short, 15-page report clarifying the facts around the disaster

India’s Aircraft Accident Investigation bureau has released a preliminary report on the Air India flight that crashed in June, showing the fuel to the engines was cut off.

A preliminary report depicted confusion in the cockpit shortly before an Air India jetliner crashed, killing more than 200 people last month, after the plane's engine fuel cut-off switches almost simultaneously flipped off,

A US Golden Chassis helped download 49 hours of flight data from Air India's crashed Boeing 787-8's black box. The AAIB used the device to recover crucial data for the investigation.