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Rant: Had to pick between a full avionics bench test or just swapping a suspect LRU on a Citation last month.

The MFD kept blanking intermittently, and I had the box pulled. One senior guy said to run full pin-out checks on the bench, which would've taken 4 hours. I swapped it with a known-good unit from stock to confirm the fault first. It fixed it immediately, saving a ton of time. When do you guys think a quick swap is the smarter move over a deep bench dive?
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3 Comments
logan_young29
Totally did the same thing with a nav radio last week. A quick swap can confirm the bad box in minutes instead of hours. It just makes sense to rule out the easy stuff first.
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claire_hart53
claire_hart5314d agoMost Upvoted
Sounds like a lot of work for a maybe. Couldn't you just check the wiring first?
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drew55
drew5514d ago
Ever think about how a quick swap can actually help @claire_hart53's wiring check later? If the new unit works, you know the problem is in the box, not the plane's wires. Saves tracing a bad circuit for no reason.
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