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The wire I nearly cut on a 737 because the manual drawing was 12 years old
Last Tuesday I was tracing a fuel quantity fault on a 737-800 that had been flagged three times in two months. The wiring diagram in our binder showed the harness running along Station 480, so I started probing there and got nothing. An old timer named Ray stopped me and said the drawing was from before a 2011 service bulletin rerouted that whole bundle 8 inches higher. He pulled the updated print off his tablet and sure enough, the wire I was about to cut was the one I needed. Anyone else run into stale prints that almost got them in trouble? Would love to know how your shop handles revision control.
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logansullivan16h ago
The "old timer named Ray" part really got me because I used to roll my eyes at guys like that. I figured if it wasn't in the current binder, it wasn't real, and I'd trust the paper over some guy's memory every time. Then I spent two hours chasing a chafed wire run on a 737 that a service bulletin had moved, and the print in the binder was older than my truck. Ray would've saved me the whole afternoon if I'd just asked. Now I check the revision date before I even grab a probe, and if the date is older than a couple years I go find the guy who's been on the floor the longest. Your shop should honestly make those old timers sign off on print updates, because that knowledge is worth more than any online system.
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