The eddy current method is used to inspect what part or parts of the engine?

• A. Housings
• B. Fuel nozzles
• C. Turbine and compressor blades
• D. Bearings

Answer: (C)

Eddy current testing relies on electromagnetic induction to detect small cracks near or on the surface of a conductive material. This makes it especially effective for inspecting turbine and compressor blades, where high cyclic stresses produce cracks that start at the surface and propagate along critical areas like the blade root and near the edges of the airfoil. The method can quickly scan along the blade surfaces and root geometry to reveal crack indications without disassembly, helping prevent catastrophic failures. Housings, bearings, and fuel nozzles involve different geometries or defect types that aren’t as readily detected by eddy currents, so they aren’t the primary targets for this technique.