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Debate: Did digital bus troubleshooting get easier or harder after the switch from ARINC 429 to ARINC 664?

I've seen avionics techs split on whether the old 429 wiring was more forgiving than dealing with 664's timing issues, but in my experience after retrofitting a 737-800 last fall, the diagnostic tools are way better yet the fault isolation is trickier - anyone else find the learning curve steeper than expected?
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cameronb52
Nah @michael_patel, you're glossing over how 664's timing jitter makes fault isolation a totally different beast than 429's voltage drops.
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michael_patel
...and honestly I'm not sure it's that deep. People act like learning a new protocol is climbing Everest, but it's really just reading a manual and messing around with a test rig for a weekend. The tools are better, sure, but that doesn't make the old stuff any harder to diagnose if you actually knew what you were doing. Feels like folks just want an excuse to complain about progress.
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