Which factor influences nonmetallic deterioration in avionic systems?

Nonmetallic deterioration in avionic systems is significantly influenced by fungi. Fungi can thrive in high-moisture environments and can cause degradation of nonmetallic materials like plastics and rubber, which are commonly used in various components of avionics. They produce enzymes that break down these materials, leading to physical and structural failures over time.

In addition to their impact on nonmetallics, fungi can also contribute to mold growth and other forms of biological deterioration, amplifying their detrimental effects on electronic systems. Identifying and controlling moisture levels is crucial in aviation maintenance to mitigate fungal growth and preserve the integrity of avionic systems. Other factors, such as heavy metals, moisture levels, and radiation exposure, can influence the longevity and performance of avionic materials but do not specifically target the nonmetallic components in the same destructive manner that fungi do.