What indicates a DMC failure?

A diagonal line on the associated display units indicates a DMC (Display Management Computer) failure. This visual cue occurs because the DMC is responsible for sending information to the display units. When a DMC fails, it can disrupt that information flow, resulting in the display unit showing a diagonal line as a clear indicator of the malfunction.

The presence of a diagonal line serves as a direct symptom linked to the failure of the DMC, specifically illustrating that the unit is not providing the necessary data for accurate display. This is crucial for pilots as it signals that they need to take appropriate action to address the failure and ensure the continued safe operation of the aircraft.

Understanding this symptom helps pilots and maintenance crews quickly recognize the issue and take corrective actions, ultimately enhancing safety in flight operations.