Investigators are probing the wreckage and cockpit recorders to understand what went wrong just after take-off. The Air India flight climbed to 625 feet in clear weather before losing location data 50 seconds in, per Flightradar24. Saturday's 15-page report offers early insights.

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

A preliminary report into the Air India crash that killed 260 people last month showed that seconds after taking off, the plane's engines fuel cutoff switches almost simultaneously flipped from run to cutoff,