Originally Posted by Jskyking
Alex - thanks, Iíll have a look. On the plans, I keyed on the aspect that no pre- punch holes exist on the ribs for the holes Iím question. Which I donít believe is the case. So, if my interpretation is correct, itís a final drill thru the fork into the ribs?
Yes, that is what the step you circled in yellow is saying.
Final drill the holes in the fork, into the aft flange of the two ribs, at the locations where there is not a corresponding P.P. hole in the aft flange of the ribs.
If you cleco the ribs to the rear spar, you will see where two holes in the spar (per rib) don't match up with holes in the rib flanges.
The reason for this is that because of the tapper of the fork, to maintain edge distance, a couple of the holes had to be shifted slightly away from the pattern that is used for all the rest of the ribs.