he says routine maintenance of the plane did not reveal any problems, but at this point he s not ruling out any reasons for the cause of the crash including terrorism or sabotage. let s bring in allen, a forcer u.s. accident investigator and has a wide range of experience, even writing the book air safety investigate, using science to save lives one crash at a time. good to have you on with us, allen. thanks for having me, george. these were very disturbing similarities between the lion-air flight and this crash. should this raise alarms in your view about this aircraft? well, certainly it s something to consider. and, yes, i guess the short answer is yes. but all air safety investigators go about very diligently looking through the evidence, and right now we really don t have any evidence other tan the radio