Spent a full weekend chasing a bad ground on a G1000 system

Mark Hall · 2026-03-25T12:50:06.833422+00:00

Had a G1000 in a Cessna 182 throwing random AHRS faults. The logs were useless, just pointing to a general system fault. I checked every connector and bus bar I could find. It turned out to be a single ground strap behind the main avionics rack, corroded just enough to cause intermittent issues. Took me about 14 hours over two days to finally find it. Anyone else had a simple ground cause a massive headache like that?

masonbell6mo ago

Remember when a bad ground made my car radio pick up police scanners? How does it always find the weirdest way to fail?

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the_max6mo ago

Ugh, grounds are the worst for that.

6

caseyc786mo ago

Right? So freaking annoying.

3

susan_mason6mo ago

Tell me about it. Those hidden grounds are pure evil. You can chase a ghost for days. The system throws a fit but the real problem is some tiny bit of green fuzz hiding where you'd never look. Makes you want to pull your hair out after the first ten hours.

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