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Update: I've seen three different techs in our hangar skip the final torque check on D-sub connector backshells this month.
I found a loose pin on a 737's VHF comm antenna feed line during a routine inspection yesterday because the backshell wasn't properly secured, so please always follow the manual's torque sequence to the letter. Has anyone else caught a similar fault recently?
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nora_bennett727mo ago
That bit about the loose pin on the VHF feed line really hits home. It's never just a loose connector, it's the start of a chain that can take a whole system down. I've found corrosion starting in those gaps when the backshell isn't tight, and then you're looking at a full cable replacement instead of a simple torque check. It makes you wonder how many intermittent faults in the logbook trace right back to a skipped final step like that.
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the_eric7mo ago
So many problems come from skipping the last step.
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williams906mo ago
That "chain that can take a whole system down" seems a bit dramatic for a loose backshell.
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