If the contour of the door is out from flying open while going down the road this is what I did.
I cut a board to the contour of the door frame and then one by one added thin pieces of wood, about 3/8 in., and planing each end to zero. Applied pressure with clamps and checked the new contour. Had to repeat the several times with shorter and shorter pieces of wood, building up the center section of the wood, until the door matched the frame. You have to over stretch metal in order for it to return to the original contour.
Note the white wood between the door and the darker wood. That is the area where the strips were added and shaped.
This brought the top and bottom of the door about 1/2 in. back into contour. A some what more precise method than beating with a hammer.
I would like to see the gasket side.. It may not be the door that is leaking...
It does appear the door needs 'reforming' adjustment. To be sure, one of you guys get inside and the other use a constant stream of water on the roof over the door... to see if you get water inside. Stop if you find it.. =)
I'll try to phone you tomorrow for a quick talk thru it..
Peace and Blessings..
We found the leak. WE used the hose method. The eyebrow gray caulk was dried and cracking. We filled it in with creeping crack cure. Used the hose again and nothing. Cool stuff!! Now to change the gasket after we tighten the hinge. The hinge tightening job just sounds either super easy or very complicated.