Fast rates of descent
There isn't a lot in the Internet about this question but hopefully someone will be able to on here. Flying from Detroit to Amsterdam in January 2015, we were straight and level at 40,000 feet. Somewhere over central Scotland we suddenly pointed downward at a relatively steep angle I've not experienced before. Checked out the flight on flight aware and found that we briefly descended at a maximum of 7135 fpm. I wonder how usual this is. Any ideas what might have precipitated it? I can't attach the photo but I've got a screen dump of the flight aware data.
Any ideas? Thanks in advance.