Which combination of cues is commonly observed during a Red Warning on ED1?

• A. Flashing Master Warning light, triple beep, and possible aural warning.
• B. Only a visual cue.
• C. No audible warning.
• D. Only the Master Warning light flashes.

Answer: (A)

When a Red Warning appears, crews must act immediately, so the alert uses both visual and audible cues to grab attention quickly. The Master Warning light flashing provides a clear, universal visual signal that something urgent is happening, while the audible warning—typically a triple beep and any accompanying voice or additional sounds—ensures the warning is noticed even in a noisy cockpit or during high workload. This combination is designed to be unmistakable and prompt rapid, decisive action. Relying on only a visual cue or only an audible cue could miss the urgency in a busy environment, which is why the simultaneous flashing Master Warning light and audible indicator is the standard pattern.