Demonstrating compliance to 14 CFR §145.109 Calibration Requirements

An article by our Guest Blogger and SAS Instructor and Consultant Kevin Rookes

The Basic Requirements

The Repair Station Manual/Quality Control Manual (RSM/QCM) must describe the system and the procedures used for calibrating Measuring Tools and Equipment (MTE).

The repair station must calibrate MTE per intervals, procedures, and the system described in the RSM/QCM.

All MTE must be calibrated and traceable to a standard acceptable to the Federal Aviation Administration (FAA), to include those recommended by the manufacturer, and the National Institute of Standards and Technology (NIST) or other national authority. This requires an unbroken chain of documentation from the MTE through each intermediate standard used, to the acceptable standard.