March 6, 2005

I had a play with the FADEC stuff too today. I got the new HSA box for incandescent lamps. I wanted to get all the wires routed and connected where I could, but I ran into a snag. The power and ground leads for each item are a two conductor shielded cable. This means that the grounds need to be near the power busses. Well, in my plane, that ain’t so. There’s a lot of wire in the cabin harness. Too much. Trouble is, you can’t really trim any of it because of the plugs used. Some of the leads I can probably shorten, it doesn’t seem like the shield is grounded anywhere in the harness. Time for me to make a call to Aerosance. Hopefully, they won’t get fed up with me! I also have a fuel pump lamp cable. I couldn’t find a reference to this on the wiring diagram. Hmmm.

I got another DPST Switch for FADEC B. I could use a SPDT, but the DPST switches are all the same type that I have in the main switch panel, so they all match. I’ll just use one side of the switches for each FADEC CPU.