The landing gear cover skin has to be installed. According the plans this is done with rivets. However this removes the option to inspect the landing gear after a hard landing or during regular maintenance. There were incidents of cracks near the attachment bolts, those became visible after removing many rivets. Ideal would be a kind of inspection panel. However limited internal height limits the option of just installing rivnuts or nutplates. A smarter design was required and a prototype made.
The idea was drawn in Fusion 360. Rivets were strategically placed to allow for maximum clearance to the landing gear:
After machining the dummy cover skin and the doubler were dimpled and solid rivets were added with rivet tape:
Next was back riveting:
Test fit of the dummy skin, there is enough room to clean and inspect the area around the attachment bolts:
The removable panel will be held in place with 2 M4 bolts screwed in M4 nutplates, there is sufficient space above them to guaranty sufficient clearance:
After machining the panel the joggle was bent with the bead roller:
Panel in place:
