Brief Description: Countersink main spars for nutplate
countersink the holes for nutplates on top and bottom of the left main wing spar. Countersink the 30 holes for the bottom of the right main wing spar. Cleco nut plates for bottom section of the right main wing spar. Match dril nutplates and countersink rivets for nutplate attachment. Rivet the 30 bottom nutplates to main wing spar
