Honeycomb structure, the component is divided into two parts, each with a different type of core:
- Upper part with a Nomex core, a cell size of 3.2 mm1/4», and a density of 4lbs/ft.
- Lower part with a Nomex core, a cell size of 3.2 mm1/4», and a density of 6lbs/ft.

| Defect | Description | Dimensions |
|---|---|---|
| B, F | 3 mm deep drill hole to simulate the peeling between the skin and the core. | 25 mm diameter |
| C, G | 2-piece PTFE insert, to simulate the delamination between the layers that form the skin. | 25 mm diameter |
| D, H | 2-piece PTFE insert, to simulate the delamination between the layers that form the skin. | 13 mm diameter |
| A, E | Area where the core has been filled with other material, to avoid the presence of air inside the core. | 25 mm diameter |

