March 4, 2017
Plans Reference: 20-02, 20-03
Hours Spent: 5
Step 1: Machine countersinking center section and installing nutplates.
Step 2 & Step 3: Final drilling center section assemblies for retaining blocks, skipping retaining blocks install until after priming.
Step 4: Aligning center section with aft bulkhead
Step 1: Cleco on the bottom skins
Step 2: Match drill aft bulkhead and the center section
Step 3: Remove alignment bolts and debur
Step 4: Machine countersink center section and dimple aft bulkhead to match
Step 5: Seperate the skin attach flanges
Step 6: Seperate the skin stiffeners
Step 7: Seperate more skin stiffeners
Step 8: Add slight bend to bottom flanges to match the inside of the center section