Attach the W-1015-L Wing Tip to the wing assembly and insert the W-1016-L Wing Tip Rib into the aft edge of the wing tip. Properly position the wing tip rib to fit snug into the wing tip without distorting the wing tip. Flush the inboard face of the web with the inboard edges of the wing tip. With the wing tip rib positioned, mark the ends of the flanges onto the bottom and top sides of the wing tip. Using an edge distance of 5/16" layout a rivet pattern on the bottom and top of the wing tip using an approximate 1 1/2 inch spacing between rivets.
Drill #40 the forward and aft most holes of the pattern into the W-1015-L Wing Tip. Draw a centerline on the flanges of the W-1016-L Wing Tip Rib and mark the forward most rivet location, 5/16" from the forward edge of the forward upper flange. Insert the rib back into the wing tip. Use the marks visible through the holes in the wing tip for alignment. Match-Drill #40 and cleco the rib using the guide holes in the wing tip. Drill #40 and cleco the remaining holes through the wing tip into the wing tip rib using the rivet pattern as a drill guide.
Machine countersink the W-1016-L Tip Rib attach holes in the W-1015-L Wing Tip for the head of an AN426AD3 rivet. Remove and deburr the wing tip rib. Prime the tip rib if/as desired. Clean out any debris from the wing tip. Rivet the wing tip rib to the wing tip.