boeing is already working on a fix for what they say is necessary for the so-called m-cass, the software believed to be at the heart of both these crashes. boeing says it's got a fix. the faa says it is looking at this but hasn't yet authorized them to test it. the testing could take weeks, if not months. so i think both boeing and the faa have an interest in getting to the bottom of this, but we're a long way from the 737 max being back in the air. >> and have you learned anything that's in concert with this "new york times" reporting that the opportunity had not been given to pilots to better understand this kind of technology that these boeing planes had? >> reporter: this is simply a fact. certainly before lyon air, many pilots had been given minimal,