Chapter 12 - Step 1

This step simply has you drill a hole in the doubler near F-28 and make a rounded head bolt to go in it.

June 15, 2002. Here are the alignment pins made from AN3 bolts. The heads have been cut off and the end rounded. #10 holes are drilled into the center of the longeron doublers. The pins are parallel with the longitudinal axis of the fuselage as viewed from above and the side. I hope that is right.