How to remove Milgard Staionary Panel?

Thanks for posting. These Milgard vinyl doors have to be removed a specific way. The company suggests lifting and swinging the door in instead of removing the stationary panel. If you don't have the clearance, look at the interior of the stationary door at the jamb pocket to see if there are any screws or clips securing the stationary door to the jamb. Also check the outside exposed end of the stationary door for any top or bottom bracket securing the door. As far as the roller, I suspect you need the 81-018, but removing it and showing us photos will be the best way to confirm.  

I had a few thoughts. First off, I find it easier to remove the sliding door panel from the exterior of the house after removing the stationary door panel. Secondly, looking at your first photo, it appears that you have an aluminum extrusion on the exterior side of the lower track. See if you can pry it up and out of the track. That could be what is stopping you from clearing the bottom track. Also take a look at the related videos on patio doors to see how those patio doors were taken out of the frame. That may give you some better insight as to how these generally work. A worst case scenario would be that the header has sagged and the top of the door main frame is pressing down on the doors.