are also learning that files were deleted from the pilot's computer even closer to the flight date than they originally thought. that could be meaningful or not. we all clean off our computers from time to time. cnn's pamela brown joins us now with more on this. let's start with the "telegraph" reporting on the transcript. a few caveats, right? >> reporter: that's right. at first glance it looks uneventful. but there are parts of this purported transcript that the telegraph newspaper obtained that could be interesting to some, especially considering we're dealing with a missing plane. and there are a couple of aspects of it. for one the pilot repeated the altitude of the plane. and also at the very end of the 54-minute conversation the pilot didn't repeat what air traffic control said. now, that's a standard operating procedure. the pilot is supposed to repeat it. that doesn't always happen according to pilots that we've been speaking to. it's not uncommon for pilots to use sort of informal conversation with air traffic