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Rebuilt battery cables, installed shunt cover

Rebuilt battery cables, installed shunt cover

TLDR

  • Rebuilt battery cables
  • Installed shunt cover
  • Got confused about avionics error message

Detail

Battery cable & Shunt cover

I decided to redo a segment of the battery cable - from master contact to the shunt.

The previous cable was working, but the way it was routed interfered with installing the shunt cover, so I made a new one.

Process was pretty straighforward:

  • Rough measured & and cut the cable length
  • Crimped one side
  • Bent the cable and test fitted it on the airplane
  • While on the airplane, I “clocked” the other end of the cable lug, and marked the position using a sharpie.
  • Crimped the other side.

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With the cable properly routed, I installed the shunt cover. The only tricky part was to identify the correct position to drill the screw holes on the shunt.

I laid a piece of paper on the airplane and poked the holes on top of the rivnuts. Then I transferred the hole position from the paper to the cover, then then drilled away.

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GNX375 Error message

I noticed several error messages on my GNX375 so I took a picture. I have not got a chance to debug the issue though.

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  1. GDU disconnected. External flight plan crossfill inoperative.
  2. GPS searching sky. Ensures GPS antenna has unobstructed view of sky.
  3. Transponder has failed.

I suppose the second message is expected, as I am working inside my hangar.

But I am unsure what to do with the other 2 messsages. For the first one “crossfill inoperative”. I tried to crossfill flight plan from 375 to G3X and vice versa, and they seem to work. I also tried transponder code, they worked too.

And for the “Transponder has failed” code, I have no idea what it means. The transponder says “ 1200 standby”, and I was able to change to a different code. There are no red crosses on either G3X or GNX375..

Next time I go to the hangar I’m afraid I need to spend more time digging through the logs.

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