The probe into last month's crash of an Air India plane in Ahmedabad is far from over and it is unwise to jump to any premature conclusions, airline CEO Campbell Wilson said in an internal memo on Monday after the release of a preliminary report by investigators.

India’s initial findings into the crash of an Air India aircraft last month raise more questions, according to the airline’s Chief Executive Officer, who defended the fitness of the cockpit crew and the company’s track record of inspecting its fleet.

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