Trim Controls News Today : Breaking News, Live Updates & Top Stories | Vimarsana

>> reporter: the second boeing 737 to crash in the last eight months in the first to go vertically into the sea killing all 189 on board. in both cases radar showed similar violent oscillations, pitching up and down before the plane crashed. in this case there were other problems, that plane had maintenance issues with airspeed and other gauges. it is the latest generation of boeing at 737 with more powerful, fuel-efficient engines necessitating a redesign of the plane's trim controls. where the two trim control switches are turned off and the plainest powered up it causes a different reaction...

This is about 3400 to 4,000 feet per minute. a normal descent as you're coming into land would be about there. okay so it's not like they were lining up to land at some airport and got distracted. that's not what happened. something took control of the aircraft something changed the direction. >> you speak of control. because there's a thought some people have wondered were the pilots incapacitated. were they not aware that the altitude was dropping so much? does this speak to them being in control or perhaps on auto pilot? >> no the necessarily. there's two or three things that could have cau...