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

Try to figure out what was going on. abc's david kerley with what happened in the cockpit. >> reporter: tonight, word the fbi is joining that investigation into the certification of boeing's new 737 max, after those two crashes. and chilling details about the first crash in indonesia. there was trouble the day before on a flight, the jet moving dramatically up and down after takeoff. the pilots confused. but a third pilot, sitting the jump seat, according to bloomberg, apparently saved the flight. >> there's this chaotic situation in the cockpit. the pilots are trying to figure out how to solv...

Part of the reason is because of automation and the computer technology and fantastic avionics and fantastic training. right now the world is trying to get to the bottom of two serious plane crashes in ethiopia and indonesia, and the question is is there some common link that can be fixed. and one of the theories is that it may be a software problem having to do with a trim system. in other words, the system that keeps the plane level. as you can see we have more than two dozen airliners around the world that have grounded the plane and the list of countries grounding it is growing. i now coun...

The vertical speed was erratic. now you're talking about this system where the plane noses up, this system where boeing brings the nose down. there's concern about that, that the pilots may not have known how to override that system what are your thoughts? >> i disagree with that pilots not knowing unless the training syllabus that went to. >> trace: it wasn't in the training manuel a lot of pilots said when they came out with this, a lot of override, the maneuvering characteristic system was not in the initial flight crew training manual. so it will be put in now. that's a complaint they had....

Knee, both tie lots. two switches. turn the whole system off. that argument that they're saying isn't clear. other than the terminology. if they didn't call it mcats, they called it a run-away trim. your trim system. so you know, i discount that. what i do look at and concerned about is the trim system on the airplane. did it play a role in this. did the pilots understand that they should turn off the trim whenever they have a problem with it. i mean, you have indications visual, audio and right beside your knee, a wheel going around, tells you the trim is going. the you're not holding the swi...

Was wrong. one where the pilots had to deal with a trim system that was misrigged so if they pulled the nose up the nose went down and the manuals were wrong. so when you dig. but this takes years to figure out. these cases lasted an of an age of 3 1/2 years. but eventually there were mechanical reasons. and some of those cases the ntsb said it was the pilot. >> what that must do to that pilot's family. >> terrible. practically most of those cases the pilot was deceased. but it's the families that were the driving force. many of them found me and said we need to turn this around. we can't beli...