Project: TerryS     -     Entry

Jun 11, 2022 7 Wired pilot stick + troubleshooting Category: Avionics
Routed bundle and wired most of the pilot stick controls and the copilot PTT into the GAD27. All that type of stuff runs through the Gad 27, and the avionics shop set up a aux cannon plug type connector to pin all that stuff into to integrate it into the system. Both PTT buttons, Ap disconnect and the trim Hat switches work perfectly, but I'm not getting power to the flap motor. That switch is on the panel, but it runs through the same plug so I pinned it at the same time.

I checked continuity and thought it was fine, but when I hit the go button there's no voltage on the gad output for the motor.

Since the GAD can speed schedule the flaps, I though maybe I had a setting wrong, so I went in the setup menu and set the flap operating speed to a max of 100 kts. No joy.

Also thought that maybe since I don't have the position indication system wired n yet, maybe that was preventing them from getting power, but eeh guys on VAF say they should work anyway.

I chased this for most of the afternoon with no luck and will continue troubleshooting it tomorrow. Not much to show for today, other than 1/2 the stick working, which I guess is something.

Teh pic below is how I elected to route the wire bundle coming out of the stick grip. The prefab bundle comes straight out the bottom, has a big loop aft with lots of room to move around without rubbing on anything then a nice big service loop on the next port bay over. I spliced into it there with simple D sub pins covered with heat shrink and ran fwd with the main wire bundle in the tunnel and up the right side of the firewall where it then ties into the aux connector that feeds it into the GAD.

Hard to tell in the picture, but everything is secured to the floor with adhesive backed wire tie mounts. I don't trust the peel and stick tape that comes on these for something this critical, so I peeled it off and glued them down with E6000.




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