What is the consequence of repairing advanced composites with traditional fiberglass techniques?

Repairing advanced composites using traditional fiberglass techniques can lead to significant issues that affect the airworthiness of the component. Advanced composites are engineered materials designed to have specific mechanical properties and behaviors, which are different from those of traditional fiberglass composites.

When traditional fiberglass techniques are applied to advanced composites, there’s a risk that the unique properties—such as strength, stiffness, and weight—may not be properly matched or replicated. This mismatch can result in a repair that does not restore the original performance characteristics of the component, potentially making it unairworthy.

Moreover, advanced composites may require specific bonding agents, curing processes, and repair techniques that are tailored to their properties. Failing to adhere to these requirements can compromise the integrity of the repair, jeopardizing safety and performance, which is critical in aviation applications. Thus, using unsuitable repair methods may indeed lead to the component becoming unairworthy.