I've recently done my Boeing 737 type rating in Sweden. While there we had a number of insructors, mostly Scandinavian, some good, some appaling! However the point of the post is that we were told that a Nordic airline had just this problem. Lost Hyd Sys A, couldn't get into destination and alternate was a long old treck away. The crew, who knew their books well, decided to close down No 1, raise the gear, and then restart it. It all ended up with a happy ending and is a classic reminder that tech training these days is perhaps a little shallow. With the basic CBT training and never sight nor sound of a real instructor, how well do we know the aircraft systems? Not as well as we could?