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That moment you realize your torque wrench has been off for months
So last week during a routine inspection on a Cessna 172, I pulled out my snap-on torque wrench I have been using for 3 years. I decided to check it against a digital tester the shop just got. Turns out it was reading 5 foot-pounds low across the whole range. I had been under-torquing cylinder head bolts on two different engines for who knows how long. Nothing has failed yet but man that scared me. How often do you all send your torque wrenches out for calibration?
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dakota_taylor3920h ago
That feeling is the WORST. Glad you caught it.
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coran6320h ago
That moment you realize your torque wrench has been off for months" hit me right in the gut because I've been there. For smaller aviation work like cylinder heads, I send mine out every 6 months, but I also keep a cheap beam style in the toolbox to cross check before big jobs. The thing is, most shops and garages just assume their click style wrenches are accurate forever, but they drift with age and drops. You can buy those little digital adapters for under $100 now, makes checking super quick before each use. If you can't afford to send them out that often, at least get a known good test bar or use a friend's certified wrench to compare once a month or before critical fasteners. Better to catch it like you did than have something let go in flight.
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