Nondestructive Testing (NDT)
Eddy Current Testing (ET)
Eddy Current Testing (ET) uses electromagnetic induction to find flaws like cracks and corrosion in conductive materials — primarily metals — without any surface preparation like dye or particles.
ET is ideal for fast, portable, on-site inspection of aircraft skins, fasteners, and landing gear components, and it can detect subsurface flaws that visual inspection would miss, without disassembly.
Because equipment is lightweight and results are immediate, ET is a preferred method for field inspections and quick-turn maintenance events.
What's Included
- Surface and near-surface crack detection in conductive metals
- Fastener hole and bolt-hole inspection
- Coating-thickness and conductivity measurement
- Portable, on-site deployment with minimal part prep
Who It's For
MRO repair stations and operators needing fast, portable inspection of aircraft skins, fasteners, and landing gear components on-site.
What ET Finds — and Its Limits
ET finds surface and near-surface cracks and corrosion in electrically conductive materials, and it measures conductivity and coating thickness — with little or no surface preparation.
It only works on conductive materials and is best suited to flaws at or near the surface; for deeper internal flaws, UT is the usual choice.
Procedures and Standards
Every inspection follows a written procedure and the acceptance criteria in your governing document. That may be an ASTM standard, an aerospace specification, or your own or your customer's inspection procedure.
Tell us which specification governs your part, and we'll confirm the technique and acceptance criteria before work starts.
What You Receive
A written report listing the procedure, reference standard, and acceptance criteria used, the areas inspected, and each indication or measurement with its result.
Related Reading
- Choosing the Right NDT Method: UT, MT, PT, ET, and VT Compared
- FAA Orders 737 MAX Bear Strap Checks — Why a Visual Inspection Decides If Eddy Current Testing Is Required
Eddy Current Testing FAQ
What materials can eddy current testing inspect?
Electrically conductive materials — mainly metals such as aluminum, steel, titanium, and copper alloys. It doesn't work on non-conductive materials.
Does eddy current testing need surface preparation?
Usually very little. We confirm any preparation your parts need before work starts.
Can eddy current measure coating thickness or conductivity?
Yes. Eddy current testing can measure coating thickness on metal parts and the electrical conductivity of non-magnetic metals.
Is eddy current testing portable?
Yes. The equipment is lightweight and results are immediate, so we inspect on-site at your facility — in Miami, across South Florida, and anywhere else by request.
Ready to talk about your project?
Call (657) 430-4666, email info@lionndt.com, or send a message and we'll follow up promptly.
Related Services
Ultrasonic Testing (UT)
Volumetric inspection for internal flaws and precise thickness measurement.
Magnetic Particle Testing (MT)
Fast surface and near-surface crack detection on ferromagnetic parts.
Liquid Penetrant Testing (PT)
High-sensitivity detection of surface-breaking defects on non-porous materials.
Visual Testing (VT)
The foundation of NDT — direct and remote-visual inspection for damage and corrosion.