Which nondestructive test confirms the soundness of a bonded honeycomb repair after cure?

• A. Eddy Current
• B. Metallic Ring Test
• C. Ultrasonic test
• D. Radiography

Answer: (B)

The test focuses on the bond line between skin and core after a honeycomb repair has cured. The metallic ring test is designed to assess that bond quickly and locally around the repair. By placing a small metal ring over the repaired area and evaluating how the area responds to light loading or tapping, you can tell if the bond is transferring load properly. A sound bond will behave as a single, rigid unit with uniform response; a debond or void beneath the ring changes the local stiffness, which shows up as an abnormal movement, gaps under the ring, or a noticeable change in the tone when tapped. Because it directly checks the adhesive interface at the repair boundary and is quick, portable, and non-destructive, it’s the best choice for confirming soundness after cure.