420 Stbd wing access and clearance for spar bolt

You NEED access for wiring and fuel line access. Used the cover just forward of this as a pattern. The opening is 3" wide and about 5-1/2" long. Blind rivits keep things flush. You need to expand the opening in front of rear spar bolt. Note marking on the wing just forward of spar. Factory opening is to small. You can cover it up with a small cover rivited or screwed in place.

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