The rule of thumb is if you are planning on using your torque wrenches regularly they need calibration at least twice a year unless you drop one; then, you don’t use it again until you have it recalibrated. As for the FAA, I have worked in five FAA certified repair stations. Our torque wrenches were calibrated every six months without question.
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“It takes considerable knowledge just to realize the extent of your own ignorance.”
Dr. Thomas Sowell
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