Jess and I went out of town for the night last night and got back into town late this afternoon. I was greeted by my order from Stein Air and sorted through that for a bit. Of course I’m happy to report that I should be 100% on the components I need to install the GNS-480 GPS unit.
On the bird I depinned the aft D-Sub connector on the X-Bus to then re-terminate all the pins into a new 9-pin D-Sub with screw lugs on it. I also sorted through my stock and found a black plastic backshell that would work nicely with the new connector. After I assembled all of that and labeled the new backshell, and secured the two sides of the D-Sub connector together, I then cut and shortened the X-Bus power feed cables, by a good 8-10″, coming from the IBBS unit (in the nose)… so that they weren’t bunched up in the wire bundle that transits down the center of the nose (no pic). I used butt splice connectors for that job.
I also routed all the wires headed up “top side” for both the X-Bus and the autopilot pitch servo auto-trim wires (white) securing them into an Adel Clamp on the right Y-support arm of the Tri-Paragon’s top shelf. Between hardware, Adel clamp sizing, wire wrangling, etc. that was a good 30-minute job in and of itself.
The next task on my list was to do a final sorting and securing of the wires down the right sidewall just forward of the instrument panel bulkhead’s right leg hole. However, I had 4 loose wires from both Relay #9 (COM1↔COM2 selector) and the Intercom that needed to be terminated into the Trig COM2 radio and decided to get these situated first.
Three of these 4 wires are shielded (one single and one double conduit) so I soldered a ground pigtail between the two (the shields go to ground on the intercom side). The fourth wire in the pic below is the white/blue PTT wire already terminated into the D-Sub connector, visible just below the two shielded wires.
And here we have all those wires terminated into the Trig COM2 radio, which finished off the wiring connections for all the components installed on the Tri-Paragon’s top shelf: Trig TY-91 COM2 radio, GRT AHRS, and Trig TT-22 transponder…. ok, and the relays too!
Not a huge feat for the day, but still got a good little bite knocked out.
Pressing forward!