Brief Description: Main Spar - Countersinking Access Panel Plate Nuts
L & R Main Spars Completed: * Attach the K1000-06 platenuts for the W-822 access plate to the W-706A flange (note that the access plate uses #6 screws on the spar flange and #8 screws around the perimeter.) See DWG 12. Dimple the access plate for a #6 screw, then machine countersink the spar flange to fit the dimples. Use a #40 piloted countersink cutter to center in the platenut. * Attach the two K1000-4 center section attach nutplates to the forward side of the spar. Countersink the W-706C doubler plate to allow the flush heads of the rivets to rest on the aft side of spar. * Spot prime all countersunk holes where the anodizing has been removed.
Started gathering material and reviewing drawings for the tie downs.