Updrilled inboard ribs/spar for the required AN525-8R20 bolts. This took all afternoon, having to cleco and un-cleco the ribs multiple times to allow access to do the through drilling while maintaining alignment of the stacked ribs and spacers.
Torqured the bolts to 15 lb-in.
Installed remaining CCP-42 and -44 rivets to complete sheet ONX-W13.
