Fatehpuriya Rangbaaj

PIC: HOW BLACK BOXES RECONSTRUCT A CRASH Black box recorders allow air accident investigators to piece together what happened in the final moments before a plane crash. Information from the flight data recorder and cockpit voice recorder is used to create an interactive animation of the flight displays.
Although evidence so far indicates that the AirAsia flight could have stalled, some of the bodies recovered were found to be wearing life jackets. Static associated with the storm may have impeded communication with air traffic control, and other aircraft in the vicinity could have been on a collision course. Recovery of the black box recorders should be able to distinguish possible causes and contributing factors. The electronic flight instrument system of an Airbus A320 comprises of more than 620 dials, switches, LCD displays and other controls, all of which must be available to both the Captain and First Officer. Of these just two displays are needed to fly the plane in an emergency: a Primary Flight Display (PFD) and a Navigation Display (ND). The PDF displays the “big-five” flight instruments: an artificial horizon, the airspeed in knots, altimeter in feet above sea level, vertical speed in feet per minute, and heading indicator in compass points. The ND has multiple modes, displaying flight plan information with heading, airports, radio beacons and waypoints; aircraft systems data such as fuel status; and weather radar which detects rain, hail, ice crystals and snow. The weather radar does not detect clouds, clear air turbulence, windshear or lightning. When the two “black boxes” -\-\ the flight data and cockpit voice recorders -\-\ of Flight QZ8501 are recovered they are expected to reveal what happened during the final minutes of the Indonesia AirAsia Airbus before it crashed into the Java Sea on December 28, killing all 162 passengers and crew. - © GraphicNews