How does a Level 1 priority appear in the E/WD without displaying a system page on the SD?

In the context of the A320 systems, a Level 1 priority event is designed to alert the crew to conditions that require attention but do not necessitate immediate action. When such an event occurs, it is indicated on the Engine/Warnings Display (E/WD) without switching the view to a system page on the Systems Display (SD).

An Amber Caution is the correct indication of a Level 1 priority event. This is because amber indications are used specifically for caution messages that signal abnormal situations which need monitoring or investigation. They are not as critical as red alerts, which signify immediate or serious hazards and typically require urgent response or action.

In this instance, since the acknowledgement of the event is visual and does not require switching to the system page, Amber Caution serves as the right descriptor for how these priority events manifest on the display, allowing the pilots to be informed without losing focus on their current tasks.