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

The Air India airliner carrying 230 passengers and 12 crew members was on its way to the United Kingdom when it crashed into a building shortly after takeoff on June 12, killing all aboard, except for one survivor, and several people on the ground, according to authorities.

England clinched a nail-biting 22-run win over India in the third Test at Lord’s on Monday, taking a 2-1 lead in the five-match series. In a contest that swayed dramatically across five days, it was Shoaib Bashir who sealed the result with the final wicket,