UGH! Afraid that was where you might be and that doesn't look like a happy place!
Sometimes what I see on drawings is not right, so hope for the best that I am wrong!
I "think" it shows much of the whole door has to be taken apart??
But looking at the drawings and seeing it in person may help!
For the parts catalog and drawings of what should be there:
https://www.winnebago.com/Files/File...h25t_doors.pdf
Drill down to the correct RV and then "doors and compartments to get here:
https://www.winnebago.com/Files/File...h25t_doors.pdf
At this point you get all the different type doors, so move down several sheets through the compartment doors and get to the entry door section! It is labeled sheet 1 of 5 in the lower left but that is after you pass all the WRONG doors!
But when I get down to the entry door, it looks like it is a job to get the parts out, so I encourage you to look it over and compare to what you see.
I'm okay with being wrong if you find it not that bad!
Click this snip to get a better view or go direct for the more complete info!
I see it may have to have the parts I marked blue removed to get to the good stuff I marked in red?
See if that makes any sense of the plan? It looks like a bad idea for how to built it?