[Henchster]

A report by the ATSB last month said the plane was likely out of control when it plunged into the ocean with its wing flaps not prepared for landing, casting doubt on theories a pilot was still in charge.

How do they know this?

[Red Dog #1]

Perhaps from a wing flap that was found. Inferences could be made from the location of impact damage and/or the position of the flap actuation components if still attached.

https://www.google.com/amp/www.ibtimes.com/flight-mh370-update-tanzania-wing-flap-debris-affirms-focus-search-efforts-indian-2419906%3Famp%3D1?client=safari