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Module 7 — Maintenance Practices

7.18(c) — Non-Destructive Inspection (NDI)

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Non-Destructive Inspection (NDI) — also called Non-Destructive Testing (NDT) — detects internal and surface defects without damaging the component. NDI methods are essential for finding cracks, corrosion, delaminations, and other defects that are not visible to the naked eye. Maintenance engineers should understand the principles, capabilities, and limitations of each method.

9 sections 7 worked examples 9 key formulas 6 tables 5 tips 8 warnings

99 exam-style questions in our bank test this topic. This note teaches the theory behind every one of them.

What you will learn

  1. Principles Common to Every NDI Method
  2. Dye Penetrant Inspection (DPI / LPI)
  3. Magnetic Particle Inspection (MPI)
  4. Radiographic Inspection (X-Ray / Gamma Ray)
  5. Eddy Current Inspection
  6. Ultrasonic Inspection
  7. Borescope/Videoscope Inspection
  8. Other Methods in Everyday Use
  9. Choosing the Right Method for the Job
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