Flight 587's final seconds
NTSB Chairwoman Marion Blakely relays the data from the last 28 seconds of the flight data recorder aboard flight 587.
First wake, 28 seconds remaining
• Acceleration data is consistent with a wake encounter about 28 seconds before the end of the flight data recorder (FDR) data. Airplane attitudes did not change much in the first encounter (of a wake).
Second wake, 8 seconds remaining
• Acceleration data is consistent with a wake encounter about 8 seconds before the end of the FDR data. The airplane is responding normally, essentially, to the pilot's input and input of other control factors.
• The second encounter of a wake appears to be similar in intensity to the first. The airplane appears to be consistent with flight control inputs.
• During that same last eight seconds on the FDR there were side acceleration excursions of about 0.3 G, 0.4 G, and an opposite 0.3 G coincident with rudder deflections. The plane was moving and the rudder was moving, as well. The NTSB says this is a very significant lateral acceleration.
Last seconds
• About 2.5 seconds before the end of the FDR data, the rudder position data becomes unreliable.
• The side acceleration increases from about 0.3 G to about 0.8 G (0.3 G and 0.4 G is considered to be a very significant side acceleration).
• The airplane heading changes at about 10 degrees per second to the left.
• The bank angle is increasing through 25 degrees, left wing down, with the control wheel to the right.
• The pitch attitude drops to 30 degrees, nose down, while the vertical G-load increases to over 2 Gs.
• The end of the FDR data occurs when the airplane is at about 2,900 feet, which is about 20 or more seconds before the ****pit voice recorder stopped.