Investigators to conclude the plane crashed in the indian ocean. in june, a piece of the plane s wing, called a flapper-on, watched up on the coast of tanzania. analysis shows the wing flap had not been deployed before the crash, another sign no one was in control in those final moments. you would deploy the flaps by lowering it, slowing the plane down. reporter: bob hepp, a flight instructor, took us to demonstrate what the pilot should have done if they planned to successfully ditch the 777 in the indian ocean. we re going to do a landing now and deploy those flaps. we re going to put the flaps in, and this allows us to descend more steeply, slower and more steeply without picking up speed. reporter: the fact the flaps