12-17 JAN 15: Page 20-5 steps 3-8, Gretz pitot mast, Prekote: 28.75 hours

Inserted the W-1028B wing box J-stiffener and clecoe the W-1004-L bottom wing skin to the main spar, rear spar, ribs, and stiffener.  Clecoed the W-1005-L bottom outboard wing skin to the spars, ribs, stiffeners and bottom inboard wing skin:

Installed the Gretz pitot mast.  Fitting backing plate and reinforcement angle:

Cutting out mast hole in the wing skin:

Final fitting:

Now that the mast was fit, I had to go back and drill a second whole in the ribs to route the angle of attack tubing – forgot to do so when drilling the hole in the ribs for the pitot line.  Would have been much easier before the ribs were installed!  I made a jig to fit to the ribs, so the hole was in the same position for each rib:

Had to use the angle drill for the wing walk ribs:

Deburring right bottom wing skin:

Both skins drilled, deburred, and scuffed for priming – a lot of holes!

Some of the flight control parts Prekoted and ready for priming: