Online Community of Zenith Builders and Flyers
The Front Wing Upright (6-ZU-2-6) positioned in front of the center spar (view of the right side from inside):
Then we position and drill the outside Upright Doubler (6-ZU-3-5) on each side of the fuselage. The flat .032-inch plate overlaps on the outside of the fuselage side skins and covers the holes of the original Wing Uprights.
After back-drilling it, we cleco the outside Upright Doubler (6-ZU-3-5) in place:
In our demonstrator Zodiac CH 601 XL, we also replaced the center console between the seats and the right side seat bottom, due to "wear and tear" on the factory demonstrator plane...
Now we installed the Side Doublers (6-ZU-3-2), .063-inch plates positioned on the insides of the fuselage assembly sides behing the main spar. The view below is the Side Doubler on the left side, viewed from under the seat:
View from the outside where the Side Doubler is positioned:
Here is the "Z-angle" diagonal stiffener, after being positioned and drilled (on both sides of the fuselage) in front of the main spar:
With the center spar section still clecoed in place in the fuselage, we position and drill the Bottom Skin Doubler (6-ZU-2-9) along the bottom of the fuselage. Like the Upright Doubler, this is to cover the original holes drilled throught the floor skins for the center wing spar section:
Steve clecoes the Bottom Skin Doubler in place as Roger back-drills the existing rear center spar holes into the doubler.
We drilled a new rivet line along the forward edge of the Bottom Skin Doubler, and then backdrill the forward center spar holes into the doubler.
We then removed the center spar section to finish drilling and riveting the Top Doubler - we did this now only after we were able to verify the parts and fit:
...and we rivet it together:
Roger was happy to meet with builders in Florida and for the opportunity of going over the upgrade package kit:
Gus Warren is an A&P mechanic and flight instructor, and he has extensive experience building and maintaining Zeniths. Gus is making his services available to builders who need help with the Upgrade Package installation. Contact Gus directly at 386-316-6324 or 505-363-9221.