Explanation should include
- determining whether a part needs the dye-penetrant process
- locating small cracks and discontinuities open to the surface
- ensuring the part is accessible to apply penetrant
- ensuring the part’s surface is clean
- applying penetrant to the part to be inspected
- removing excess penetrant and applying developer to the surface
- drawing out the penetrant
- checking for lines on the surface, indicating the location of a crack.
ACS:
AM.I.K.S5
Process/Skill Questions:
- Why is it important that the aircraft part be accessible for a liquid penetrant inspection?
- What defects can be discovered with dye and/or liquid particle inspection?
- What materials can be inspected with liquid penetrant?