What system should be used when a repair requires uniform pressure across a bonded surface?

The contact vacuum bag system is specifically designed for situations where a repair requires uniform pressure across a bonded surface. This system utilizes a flexible bag that forms a seal around the repair site and relies on vacuum pressure to ensure contact between the repair material and the substrate. The vacuum application is crucial because it eliminates air pockets that could cause weak bonds, ensuring that the adhesive cures correctly and effectively.

This method is particularly beneficial for low observable aircraft maintenance, where maintaining the integrity of surfaces is critical for performance and stealth characteristics. The design of the contact vacuum bag system allows for even distribution of pressure, accommodating various shapes and sizes of bonded surfaces as well.

In comparison, other options such as the conventional vacuum bag system, manual pressure application, and standard vacuum pressure systems may not provide the same level of control or uniform pressure. They might be suitable for different types of repairs but lack the specificity and effectiveness required for low observable applications where surface integrity is paramount.