Downloaded from https://www.everyspec.com ADS-43A-HDBK 2.2.3.1 Justification for Process Critical Characteristics Process critical characteristics define design compliance for all parts, and are critical for the application of a part in its intended use. Metallurgical processes, such as casting, forging or welding, determine the strength and acceptability of metallic parts, while electrical processes, such as soldering, bonding or insulation resistance, determine acceptability of electronic and electrical assemblies or components. Other processes are critical for operational environment reasons, such as anodizing, coating or painting.
Deviation from critical processes is NOT allowed without the specific approval of USA ATCOM engineering. 2.2.4 Inspection Methods Inspection methods may include both destructive or non-destructive. Generally, the destructive methods are used before the raw material is worked or processed. Non-destructive methods can be used before, during, or after manufacture of the part or, assembly. Inspection methods are used to inspect and verify that the critical characteristics are as required. Refer to “Code B Testing” for applicable test documents. Destructive Inspection Methods Include the Following: A. Chemical Analysis B. Spectrochemical Analysis C. Tensile Test D. Charpy Impact Test E.
Cold Bending Test F. Peel Strength of Brazed or Bonded Joints G. Acid Etch for Grain Structure H. Case Depth Inspection Non-Destructive Inspection Methods Include the Following: I. Electromagnetic Testing J. X-Ray Testing (Radiography) K. Liquid Penetrant Testing L. Magnetic Particle Testing M. Ultrasonic Testing N. Coordinate Measuring Machine 0. Microscopic Test for Coating Thickness P. Profilometers (Comparison Tester) Q. Brine11 or Rockwell Hardness Testing R. Pressure Flow or Leakage Testing S. Nital Etch 1 8