Brief Description: Dimpled Wing Ribs and Coutersinking of L top spar
Dimpled Wing Ribs (using Cleaveland "structure" dimple dies" and Coutersinking of L top spar. Riveted fuel tank area rib flanges to spar rivets that sit underneath tank skin. These are not addressed in the plans. CSK spars and riveted with AN426-AD3-4 rivets.
