you're looking for new clues and always look to crashes of the past to see if they give you any light, shed any light as to where to start here. so, obviously, they will be using the lion air crash, looking at the similarities both on takeoff, both they hadn't made their cruising altitude, both when they started getting in trouble, they were at the exact same speed. according to flight radar. it could be wrong. i think it was 383 knots. both planes at that speed. at this point, they might have just been taking off the flaps. maybe not. and the pilot reported a problem with air speed indicators, according to other pilots that heard it on the com line. that could be wrong, too. so the similarities go far beyond just the same kind of plane on takeoff. there are just a lot of similarities that investigators should not overlook and write off as coincidence. >> talk to me about the flight data recorders, wa you and other airline safety experts would want to see when those recorders are found. what exactly will you be listening or looking for? >> well, two things. most -- the first and foremost