Remove the handle (crank) from the mechanism.Drill out the 2 rivets that attach the crank assembly to the Window frame. Push the window outwards, slide the flat bars that push the window open out of the tracks and remove. There is usually a small round foam or rubber seal about 5/16” diameter between the stationary upper window and the lower moveable window , pry this seal out. Rotate the lower window up 90 degrees or more, to a horizontal or higher position. Pull down at the hinge point and it should come out. I reinstalled the crank mechanism with 2 small stainless screws and nuts rather than rerivet. It is actually easy to do after you have done it once and understand the process. I’ve done it 3 times. This method applies to the newer style, flush mount (“frameless”), double pane, windows.
2017 Aspect 27K