The final report Criminal_investigation , released Publishing on 25 March 2008 , concluded Coming_to_believe that the pilots lost Earnings_and_losses control of the aircraft after they became Becoming preoccupied with troubleshooting Resolve_problem the inertial navigation system and inadvertently disconnected Removing the autopilot .

The Australian Transport Safety Bureau investigation found Know a fault with one of the aircraft 's three air data inertial reference units and a previously unknown software design limitation of the Airbus A330 's fly-by-wire flight control primary computer ( FCPC ) .