17
Spent 6 hours chasing a phantom voltage drop on a G1000 install
It was a simple LRU swap on a Cessna 182, but the new unit kept throwing a power fault. My meter showed 28 volts at the connector pin, but the avionics bay was a mess of old splices. The real issue was a corroded ground strap under the panel that only showed up under load. Has anyone else had a ground path hide that well?
2 comments
Log in to join the discussion
Log In2 Comments
reese17715d ago
Man, chasing those ghost grounds is the worst. I had one on an old Bonanza where the ground path went through the airframe itself, looked perfect until you put a real load on it. Took forever to find because the voltage drop only showed up when the autopilot servo kicked in. Makes you want to just run a whole new ground wire to the battery every time.
4
johns1815d ago
Tell me about it, I've spent more time chasing voltage drops than I care to admit. It's always the thing you assume is solid that bites you. Makes a guy feel REAL smart when the fix is just running one new wire.
4