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PSA: I torqued a hydraulic line to spec and it still leaked, turns out my wrench was lying
Last Tuesday I was finishing up a landing gear actuator swap on a King Air and torqued the B-nut to the book number, 135 inch pounds, and it still weeping fluid when I ran the gear swing. I chased that leak for two hours, pulled the line twice, replaced the packing, even swapped the nut, before a guy with 20 years on me handed me his wrench and said 'try mine.' Sure enough my clicker was reading about 20 percent light, so I had been under-torquing that whole time and never knew it. Sent it out for calibration and the shop said it failed on three of five test points. I keep a known-good beam wrench in my box now just to cross check before I sign anything off. Anybody else get burned by a wrench that clicked fine but was way off, and how often do you guys actually send yours out?
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