How many items must be checked if the Maintenance Fault light is activated?

When the Maintenance Fault light is activated, it indicates that there are several potential issues that need to be addressed to ensure the proper functioning of the system. The correct answer identifies that nine potential issues must be checked. This thorough approach is critical because it helps to uncover a wide range of possible faults that might not be immediately apparent.

By conducting a comprehensive check of these issues, technicians can better determine the underlying cause of the fault light being activated. This extensive evaluation ensures that any problem—ranging from minor faults to major system malfunctions—is identified and rectified, which ultimately aids in maintaining system reliability and performance.

Recognizing the necessity for a more extensive examination highlights the complexity of modern systems and the importance of a detailed fault-finding process in maintenance practices. In contrast, focusing on a fewer number of checks would not sufficiently address the potential range of issues that could be causing the fault light to activate.