Brief Description: Prepared Extrusion angle and nose ribs for install
Part of the Zenith modification is to beef up the main spar where it attaches to the carry through spar, and to beef up the first three nose ribs where they attach to the spar.
1) Clamped the extrusion angle to the wing spar, and back drilled the upper and lower holes. 2) An error was made in the lower holes, but the upper holes were fine. I ordered another 6ZU1-1, and resolved to use this one as a template to drill that one, except for the lower holes. 3) Clecoed 6ZU1-1 in place. 4) Made modifications to the first nose rib, per dwg 6ZU1. 5) Clecoed a 6ZU1-4 to the first nose rib. 6) Back drilled 6ZU1-4 through the AN3 bolt holes on the main spar. 7) Created rivet spacing on 6ZU1-4 per dwg 6ZU1, and drilled with #40 bit. 8) Back drilled through 6ZU1-1. 9) Cleaned and deburred mounting holes from nose rib to 6ZU1-4. 10) Primed with zinc chromate primter. 11) Riveted 6ZU1-4 to nose rib, and clecoed in place. 12) Conducted a similar process for the second nose rib. 13) Repeated process for the third nose rib.
Completion awaits arrival of the replacement 6ZU1-1, and a 6ZU1-3 nose rib angle. Where the 6ZU1-3 went is anyone's guess.
