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."

The CEO of Air India sought to draw a line under rife speculation around the cause of last month's air disaster in Ahmedebad, saying the preliminary investigation had ruled out a mechanical cause for the crash.