In the first photo the middle forward rib HS-707 has been riveted to the upper panel of the left skin. The skin is now upside down and the middle aft rib HS-708 has been cleco'd into place temporarily as I prepare to rivet the bottom side of the middle forward rib to the skin. The middle aft rib is then removed and the forward spar assembly as seen in image 3 is slid into place and cleco'd to the middle forward rib and the outer rib HS-706 and the middle aft rib is repace and cleco'd back into position against the forward spar. Forward spar assembly and forward and aft middle ribs blind riveted together.
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