What aspect of engine control cables should be inspected?

Inspection of engine control cables is crucial because these cables are essential for the safe operation of an aircraft's engine systems. Focusing on fraying or structural integrity ensures that the cables are not compromised. Cables subjected to wear, corrosion, or damage can jeopardize their performance, leading to potential malfunctions in engine control. Detecting early signs of fraying indicates that the cable may not operate effectively under the high-stress conditions experienced during flight, which is critical for pilot control and safety.

While other aspects like visual appearance and lubricating grease are important for general maintenance, they do not adequately assess the cable's ability to perform its function safely. Length and color are less relevant when considering the operational integrity of the cables. Therefore, a thorough inspection that focuses on the condition and strength of the cable is necessary to maintain aircraft safety and reliability.