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turbines
We operate an FAA approved repair station and have been performing in house calibration of torque wrenches and pressure gauges for many years. Out procedures basically compare our MTE to masters that are sent out to a calibration lab on regular intervals. We perform no repairs or adjustments and equipment that fails is sent out for repair or replaced. Recently we decided to add micrometer calibration to our procedures and in the process of having the new procedures accepted by the FAA they are reviewing the entire procedures manual and have asked us to provide answers to the following per FAA Advisory Cirular 145-9 (4-12).
What is the basis for the test intervals (manufacturer, standard industry practice, etc.)?
Is the calibration technique recommended by the manufacturer or standard industry practice?
The FAA wants us to reference documentation relating to standard industry practices with regard to methods of calibration and intervals when no specific recommendations have been provided by the manufacturer. We are having trouble finding documentation the FAA will accept. NIST, for instance, provides nothing on the calibration standards for torque wrenches. Where are the resources that might help us on this documentation for all types of MTE?
What is the basis for the test intervals (manufacturer, standard industry practice, etc.)?
Is the calibration technique recommended by the manufacturer or standard industry practice?
The FAA wants us to reference documentation relating to standard industry practices with regard to methods of calibration and intervals when no specific recommendations have been provided by the manufacturer. We are having trouble finding documentation the FAA will accept. NIST, for instance, provides nothing on the calibration standards for torque wrenches. Where are the resources that might help us on this documentation for all types of MTE?