Ours collapsed last fall on the way back from New England. I had a rather long list of repairs needed due to rough roads in New Brunswick and New England so I had "my RV guy" look into it. I'll have to post some pics as I can't really describe what he did, but it worked. It is supported more now from below. The aluminum rail on the hinge side failed on mine (at the top) where it was attached to the top stile. Just ripped way. It was only supported at the top and bottom by plastic spacers and bushings.
Oh, and he didn't have to pull the door from the wall.
Mike & Laurel
2012 27FB Int'l Serenity
2016 RAM 2500