Cutting the forward corners of the F-623 ribs - 2.5 hours

Feeling confident on the marks I made yesterday after re-checking them today. I made the initial cut. I purposely didn't cut enough but left myself in a good position to test fit, mark, cut and check. Eventually it was perfect.

Next I need to trim the flanges of the F-623 ribs, but I need to ensure the correct angles and the only way to do that is to cleco on the F-770 side skins. Once I did that, I could transfer the rivet hole locations on the flanges of the F-623 corner ribs....that would allow me to flute them in the correct location.