Learned the hard way about shielding on a King Air in Wichita

Had a recurring squawk on the #2 nav receiver that drove me nuts for two days. Pulled the rack, reseated everything, swapped the unit, no luck. Finally traced it to a chafed shield wire where the bundle ran under a seat track, looked fine until you flexed it just right. Took a 10x loop and a wiggle test to find it, now I do that before I ever touch a box. Cost me about 6 hours of billable time, but I've caught two similar issues since. Anyone else had shield failures that only show up with vibration?

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