Started tonight's work by removing the Spar Cap from the Spar and deburring all the common holes Match-Drilled #30 during the last session. After deburring, the two pieces were clecoed together again. I clamped the Spar Cap to the Spar Flanges and Match-Drilled #40 the Flanges into the Spar Caps. I left the hole open between the cleco and the row of clamps (for drill clearance), drilled the hole, clecoed the hole, and move the next clamp to the end of the row. I repeated this process until all the holes are drilled.
This picture shows all the holes Match-Drilled on both sides of the Spar Flanges (all the silver #40 clecos).
The middle nine holes on each side of the Spar Flanges were countersunk #40 for AN426AD3 Flush rivets.
The next step was to cleco the HS-00907-1 Front Spar Doubler to the Front Spar. With the exception of a few holes, all the common holes were Final-Drilled to #30.
Four of the holes were Final-Drilled to #12, two were Final-Drilled to 1/4", and 12 holes were machine countersunk for AN426AD4 flush rivets. Below is the Front Spar assembly with all the completed and prepared holes.
