What is the most probable cause of frayed wiring in radar wiring harnesses?

The most probable cause of frayed wiring in radar wiring harnesses is often due to mechanical wear. Over time, wiring harnesses can experience physical stress from factors such as vibration, movement during operation, or contact with other components, which can lead to fraying. While insect attack, electrical overloading, and improper handling are considerations in wiring damage, these factors are less likely to specifically cause the type of fraying commonly observed in radar wiring harnesses.

Mechanical wear is a cumulative effect that results from continuous use and environmental exposure, particularly in an aircraft where components are subjected to constant motion and vibration. In this context, the integrity of the wiring is challenged over time, making it more susceptible to fraying. This understanding emphasizes the importance of regular inspection and maintenance practices to identify and mitigate any wear before it compromises the safety and functionality of the avionics system.