O-360-A1D Lycoming Factory Reman

[cliffy]

Agree 100% with your above  as opposed to never calibrating 

I had a compression tester go way out years ago on both pressure gages in 1 year (- 10 psi)

It does pay to check them somehow

[Buckeyechuck]

15 hours ago, EricJ said:

The Mooney SMM for my airplane only specifies a calibrated tool be used when tightening the screws on the fuel sender gaskets.   Few torque specifications in the SMM are given with tolerances, which makes them only general in any practical sense, imho.   43.13, even if somebody went out on a limb and tried to apply it as regulatory in an action, does not specify a calibration standard.   Comparing a unit under test against another calibrated device is pretty much what is done in "calibration", even to a typical recognized standard process, so I'm confident I'm meeting or exceeding requirements and can point to the relevant documents to show why I believe that.   That's really as much as anyone can do.

 

In industry, calibration should be traceable back to the national bureau of standards. Not sure how this would apply to a torque wrench but force and length or distance certainly have a US basis for those values there. Probably a bit of overkill here, but....