DATE: 01-20-2025 – TIME: 11:34 – 3:30 ~ 3:00
After completing re-assembly of the sides and channels onto the cabin floor, SD75-FF-07 says to tip the cabin on its side to facilitate installing the cabin floor stiffeners, beginning with the longerons, C75F13-1, which go on top of the side and forward skins and the vertical flange is outboard. Given that you’ve already drilled and tapered the ends they should only fit one way by now.
Once you’ve clecod the longerons, get on and cleco the LS75F10-4, floor stiffen channel and the C75F10-8 floor stiffeners in place and then complete the process by riveting them in place.
The rudder pedal channel, floor stiffeners and cabin floor stiffeners are A4 riveted while the longerons, front cabin side skins, cabin side skins, gear channel and seat front channel are all A5.
Although this is referenced on page FF-08, you should not rivet the three rivets in the inorad front position of the side skins – see the drawing below – because the lower left and right engine mount brackets need to be placed here. I put a circle around the right rivet location, same goes for the left.
With the cabin floor on its side it was not easy to get decent photos from my fixed position cameras but here are some that may be useful.
Next up on page SD75-FF-08 is the attachment of the firewall. Also previously assembled as a sub-assembly.