The purpose of my original post was to get info on the removal of the broken cover.
since I was on the road and would be repairing in the part store parking lot I wanted to see what was involved and so that I could get an exact match for the broken part.
Once obtained, the packaging described R&R procedure.
For the record.
Remove 4 trim screws inside the RV.
Remove two screws holding the screen.
Remove crank
Remove two screws holding the crank assembly.
Now the actuating arm can be slid to access the retaining clip on the end of the arm
remove the retailing clip and slide the arm out of the bracket.
The cover is now completely free of the opening mechanism
Go on top of the RV.
Remove the cover by sliding it out of its hinge point.
Mine required slightly unbending the end of the hinge tube to permit the hinge to slide out of the bracket.
Install is the reverse procedure.
30 minutes if you have the parts in hand.
You have to match the hinge type as there are several versions.