but they can learn a lot from the debris field, particularly if they find something on the flight data recorder that kind of guides them to a part of the aircraft, one of the four quadrants of the plane, the nose tail and two wings, if there were any control surface problems or control ability issue highydraulic or engine problems they ll want to look at that debris. but the black boxes are the best information they can get. i know they ve found one, i m not sure which. there are conflicting reports about that. what s most important if they only find one? you know, that s like trying to ask someone to pick between their children. they re both really important. the flight data recorder will give them poe leshltentially 1,000 parameters of what the aircraft was doing, what control wrz directed. it will give them a lot of information about the aircraft.