…fascinating, but extremely chilling reading: what happened aboard Air France 447.
And here’s an article written two years earlier by the same author, long before the black boxes for Air France 447 had been found. In it, he speculates on what might have happened to the flight. It’s interesting to compare his guesses at that time about the flight’s scenario to the facts as later revealed by the cockpit recordings:
Without the box’s data, the only physical evidence of the airplane available to investigators was the mangled wreckage. From the way it had been deformed””in particular, the way the floor of the crew’s rest compartment had buckled upward””French investigators determined that the fuselage hit the water more or less intact, belly first, at a high rate of vertical speed. Added to the ACARS messages and the satellite weather data, the evidence began to conform to a possible scenario.
By 10:45 pm, 10 minutes after the last radio transmission, the plane hit the first, small storm cell in the Intertropical Convergence Zone. Fifteen minutes later, it hit a larger, fast””growing system. And then, just before its last ACARS transmissions, the plane hit a whopper, a multicell storm whose roiling thermal energy rose more than 3 miles higher than AF 447’s altitude. Buffeted by turbulence, near the heart of a strong thunderstorm, the pitot tubes froze over. Lacking reliable speed indicators, the airplane’s computerized Flight Management System automatically disengaged the autopilot, forcing the co-pilots to fly the airplane manually.
Without autopilot, the pilots had no envelope protection restrictions, which are designed to keep the pilot from making control inputs that could overstress the aircraft. This is particularly dangerous for airliners at high altitudes. The thin air demands that airplanes fly faster to achieve lift, but they still must remain below speed limits. Flying too fast can create a phenomenon known as mach tuck, when supersonic shock waves along the wings shift the aircraft’s center of pressure aft and can make it pitch into an uncontrollable nose-dive. Flying too slow can cause a plane to stall.
Seems to me his got it pretty close to the truth.
But what was going on in the minds of the hapless pilots when they made their fateful decisions will never really be known.
[NOTE: The comments to the first article are excellent as well, many of them by pilots.]

