Air France Flight 447 crashed into the Atlantic Ocean (near here) some time ago. In the absence of much physical evidence, experts figured out that the crash involved a misunderstanding of air speed due in part to faulty air speed data from iced over sensors. Then, last April, the cockpit data and voice recorders were fished out of the sea, which is rather incredible. Since then, further analysis has confirmed the initial finding but added a twist: Yes, there was a problem with air speed, but the proximate reason for the crash is because the individuals piloting the plane (especially one of them) misunderstood, well, how to fly a plane because the things they needed to do were not part of their training.
And I’ll remind you of this post: Flight 447 and the ITCZ, which is more about the ITCZ than the flight or its demise.