What is a potential effect of using non-approved materials for repairs on Low Observable aircraft?

Using non-approved materials for repairs on Low Observable aircraft can lead to failures in radar-absorbing properties. These aircraft are designed with specialized materials and coatings that are specifically engineered to reduce their radar signatures and enhance stealth capabilities. Non-approved materials may lack the necessary absorption qualities or may reflect radar waves, significantly compromising the aircraft's low observability features.

When the radar-absorbing properties are affected, the aircraft becomes more detectable by enemy radar systems, which defeats its purpose of being low observable. This could expose the aircraft to threats that would otherwise be avoided, making the selection of appropriate materials critical to maintaining operational effectiveness and mission success.