Which activity uses a bore scope to inspect interior of engine or components?

• A. Boroscope inspections
• B. NDT
• C. On-wing engine maintenance
• D. Welding

Answer: (A)

Using a boroscope to inspect interior surfaces relies on a thin optical instrument that can be inserted into narrow passages, such as engine bores, ducts, or other cavities. The bore scope provides light and a viewing tip so technicians can visually assess internal areas for cracks, corrosion, wear, debris, or blockages without disassembling the unit. This direct visual probe is why the correct activity is boroscope inspections. While NDT encompasses many techniques for evaluating integrity, a boroscope inspection is a specific method focused on visual examination inside components. On-wing engine maintenance and welding describe broader maintenance tasks and processes, not the interior inspection method itself.