Name two common non-destructive testing (NDT) methods used in airframe maintenance.

Name two common non-destructive testing (NDT) methods used in airframe maintenance.

• A. Dye penetrant inspection and magnetic particle inspection.
• B. Ultrasonic testing and radiography.
• C. Visual inspection only.
• D. Eddy current testing.

Answer: (A)

Non-destructive testing methods used in airframe maintenance focus on finding flaws without taking the part apart or destroying it. Two common surface-inspection techniques are dye penetrant inspection and magnetic particle inspection. Dye penetrant works by applying a bright dye to the surface, wiping it clean, and then using a developer so that any dye that seeped into surface cracks bleeds out and becomes visible under UV or visible light. This is especially useful for revealing small surface-breaking cracks and porosity on non-porous metals like those used in skins and fasteners. Magnetic particle inspection magnetizes ferromagnetic materials and dusts or suspends iron particles on the surface; flaws disrupt the magnetic field and cause the particles to gather at cracks or defects, making them easy to see. These methods are quick, relatively inexpensive, and don’t require extensive equipment, making them staple choices for routine airframe checks. Other NDT options like ultrasonic testing or radiography can inspect deeper or more complex areas but require more setup and equipment, while visual inspection is essential but primarily serves as a first check and doesn’t routinely reveal subsurface flaws.

Non-destructive testing methods used in airframe maintenance focus on finding flaws without taking the part apart or destroying it. Two common surface-inspection techniques are dye penetrant inspection and magnetic particle inspection. Dye penetrant works by applying a bright dye to the surface, wiping it clean, and then using a developer so that any dye that seeped into surface cracks bleeds out and becomes visible under UV or visible light. This is especially useful for revealing small surface-breaking cracks and porosity on non-porous metals like those used in skins and fasteners. Magnetic particle inspection magnetizes ferromagnetic materials and dusts or suspends iron particles on the surface; flaws disrupt the magnetic field and cause the particles to gather at cracks or defects, making them easy to see. These methods are quick, relatively inexpensive, and don’t require extensive equipment, making them staple choices for routine airframe checks. Other NDT options like ultrasonic testing or radiography can inspect deeper or more complex areas but require more setup and equipment, while visual inspection is essential but primarily serves as a first check and doesn’t routinely reveal subsurface flaws.