CNN CNN Newsroom March 18, 2014 18:38:00
Conversation with that controller and you recognize one another's voices. you might clip it. but that sounds to me like they gave him an additional instruction, for example. we've lost your transponder, squawk 5570 and ident, in order to establish that transponder again on their radar screen. that might elicit a response like all right, good night, and he would do that while he transtran transitioned over to the next air traffic control center. i'm not at all comfortable with this clipped exit with nothing in front of it. you need to listen to the whole tape for the flight from start to finish...
Source: archive.org