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PSA: Check your crimp tool calibration after a shop move, a bad crimp on a 737's AOA sensor line cost us three days of troubleshooting in Seattle last month.
The new bench location had a slight vibration from a nearby air handler that we didn't account for, and it threw the tool's alignment off just enough to create an intermittent connection that passed a basic continuity check but failed under flight loads.
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piper7791d ago
Switched to a pull test on every crimp after a similar ghost fault.
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tessa_murray1d ago
Three days seems like a long time for a bad crimp. Wouldn't that show up on a more detailed test before the plane even left the hangar? I've seen vibration mess with tools before, but usually it's a total fail, not something that only shows up in the air. Maybe there was another factor in the troubleshooting delay. What specific test finally found the problem?
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