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I had to repair the RH upper door hinge pin. The fuselage is the wear problem on these Cardinals. The door hinge does not wear. The original pin is allowed to rotate in the fuselage thereby wearing the hole in an oblong pattern. In this case, an oversized pin needed to be fitted, The top side of the oversized pin has a notch, because removal of material from that area is not possible or wise, it is structural. This notch requires that the pin be prevented from rotating. So a tab was added to the bottom of the pin, along with some additional weld on the lower end of the pin. This completely fills the worn hole in the fuselage.
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