Last month, the ATSB have been entertaining possible theories on how the Boeing 777 plane landed in the Indian Ocean.
Based on the analysis of satellite communications data from the plane, there was already no human intervention during the last five and a half hours of the journey, indicating that Flight MH370 may have made a death dive into the Indian Ocean after it exhausted its fuel.
The ATSB is also looking at the death dive scenario in two ways. The first one is an unresponsive pilot scenario wherein the pilot and the people onboard may have already been unconscious. So with nobody to man the controls, the plane would have crashed into the sea through the so-called death dive.
The Australian agency is also entertaining the possibility that the pilot has gone rogue as previous investigations may have suggested.
Under the second theory, the pilot hijacked the aircraft after the last good night to Kuala Lumpur air traffic control, flew the plane via a pre-planned route to the southern Indian Ocean and then carried out a controlled ditching in the water.
But the ongoing analysis of a wing flap that washed ashore in the east African country of Tanzania appears to support the theory of a death dive rather than a controlled ditching.