particular problem. here's where i depart from where boeing's philosophy has always been, you let the pilots know what systems they have and what they're dealing with. then if that system fails on them, then you have a checklist for it. and this was never communicated and we found that out after the lion air crash in october. pilots getting on this airplane now, i would not blame them for feeling uncomfortable. and i myself even as a passenger, retired airline pilot of 34 years, i would feel uncomfortable with this situation. however, in the u.s. i'm confident that my colleagues would be able to handle a potential emergency with this thing. but what concerns me is i'm very confident that the ethiopian crew was well aware of this lion air accident. and if they were facing the same situation, the same circumstances, the same factors and they handled the emergency the way boeing recommended, which is a very old procedure