Next I held the skin doubler
to the side of the fuselage and marked its location with a Sharpie. I used a 1/16” drift punch to punch out the
mandrel in all of the rivets to be drilled out.
I then drilled out the rivets on each side of the fuselage. I clecoed the holes as I drilled them to help
keep the skin doubler and the fuselage sides in line. I also drilled out the rivets holding the
side skin support angles attached to the mid fuselage channel.
After drilling out the rivets
on the right side of the fuselage I prepped and primed the doubler skins and
the side skin support angles. I deburred
the edges and used a Scotch Brite pad and some MEK to clean and prep the
surfaces. I clecoed the primed skin
doublers in place on each side of the.
After drilling I removed the skin doubler and deburred the holes and
cleaned away any drill chips between the layers of aluminum.
I used the microstop counterskink to prep the
small side skin doublers to receive the CS4-4 flush rivets. I then clecoed the doubler skins in place. I also clecoed the side skin support angles
to the ends of the mid fuselage channels.
I am ready to match drill the side skin support angles and then start
pulling the rivets.
