text message to its base that its electrical systems were malfunctioning. >> eventually that air france plane's wreckage was found. we'll have more on that for you in a moment. what they were able to determine about why that plane went down is that one of those pitot tubes clogged with ice and particularly if a plane encounters with extreme weather, it's not an unusual problem. but in this case it ended up being catastrophic. the crew misunderstood what had happened. the tube told the pilot something about the speed of the plane as they did not identify as the pitot tube having iced over. they made decisions that ended up bringing that plane down into the atlantic. it's not the first time it happened and it's not just the type of plane it happened to.