True or False: The difference between the fay seal and pre-pack seal is that a pre-pack seal may have surface voids.

The statement is true because the primary distinction between a fay seal and a pre-pack seal lies in their construction and surface characteristics. A fay seal is designed to have a smooth, continuous surface that creates a tight, effective seal for components subjected to static or dynamic loads. This type of seal is crucial in aerospace applications, as it helps prevent fluid leakage and maintain structural integrity.

On the other hand, a pre-pack seal can have surface voids due to its manufacturing process or material composition. These voids may result from the way the sealant is applied or from inherent material properties, allowing for some variability in seal effectiveness. While pre-pack seals are often used in situations where moderate sealing is acceptable or in less critical areas, the potential presence of these voids is what differentiates them from the more rigorously manufactured fay seals.

Understanding these distinctions is essential for aerospace mechanics as it informs the right choice of sealing techniques depending on the specific application requirements and environmental conditions.