Title: Explain magnetic particle inspections.
Course: Aviation Maintenance Technology II (20114-II) > Section: Exploring Aircraft Materials and Processes

Explanation should include

- inspecting only the ferromagnetic materials (iron and steel) to detect cracks, splits, voids, pipes, and cold shunts below the surface
- using the fixed or portable magnetic particle unit
- magnetizing a part
- covering a part with a test medium containing ferromagnetic particles
- using either the immersion, spraying, or pouring method
- inspecting parts for defects on surface or subsurface, such as when
  - north and south poles form across defects
  - magnetic particles collect between poles
  - a pattern forms in the approximate size and shape of the defect
- demagnetizing parts.

ACS:

AM.I.K.R1

Process/Skill Questions:

- How does one demagnetize aircraft parts following a magnetic particle inspection?
- What defects can be discovered with magnetic particle inspection?
- What is the difference between circular magnetization and longitudinal magnetization?