Drilled the double riviet row of the F-976 ctr bottom skin to F-778 rear bottom skin and F-905 blkhd. Deburred and dimpled F-778, -976, and the freshly drilled holes in F-905. Smoothed skin edges.
Installed the F-916B seat rib access plates to the innermost set ribs with 8R8 screws and nuts per plans.
