Question Avionics Circuit Breaker Switch Fail

[Neal]

I think IBBS is only installed on Experimental. I don't think xcubs get it.

 

[lrobichaux]

I think IBBS is only installed on Experimental. I don't think xcubs get it.

It's my understanding that the IO-390-D3B6 (marketed by CC as the IO-393) is used in both the experimental and Part 23 certified XCubs and NXCubs. This installation has dual electronic ignition, with the dual IBBS set-up described above.

 

[lrobichaux]

Is the ignition IBBS now a CubCrafters option or it is something you specified yourself? Either way, much better than the AGM battery.

My IBBS discharge test showed over 2 hours operation of G3X touch system. I see no need for longer but a periodic discharge test is required to confirm capacity.

edit to add - Standard IBBS does not just drive the GDU 465. I gave the list of LRU earlier in the thread.

Ahhh gotcha. Forgot to answer your first question. The dual IBBS / electronic ignition / panel layout is all standard set-up from CC.

 

[Cactus Charlie]

The Avionics switch breaker protects the link from MAIN Bus to the Avionics switch. That link is wire MB11A12R which should be 12 AWG. If the Avionics switch /breaker was replaced by a plain switch then a short at the Avionics bus bar would likely blow the Main bus 40 A fuse if the link didn't burn out first.

This link is shown as AB42A18 (18 AWG) in the G3X schematic.

Before changing any breaker ratings check the actual installed wire size. The available schematics may not reflect the actual build configuration.

Pete at CC told me the actual Avionics breaker rating is 10A and it is not increased for the IFR option.