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

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.

CEO Campbell Wilson said in an internal memo that the airline is open to further inquiries and warned against "premature conclusions."