stabilization system, one pilot writes, granted, i suck at flying, but even this was egregious. then about the simulator, it's running rampant in the sim on me. pilot also expresses concerns he unknowingly misled the faa. a co-worker then assures him it wasn't a lie. no one told us that was the case. we should note the system was left out of the pilot manual. a cnn safety analyst, former faa safety inspector, and co-author of "why planes crash" joins us. david, good to see you. lawmakers and faa are demanding answers. boeing says it will continue to cooperate, but has it explained this delay in sharing these really crucial messages, it would seem? so how concerned should the public be? >> well, at this point, i don't know how concerned the public should be more than they have been already because the 737 max is grounded. it's indicating all kinds of internal issues within not only