An emergency call from the flight deck is indicated by which combination?

An emergency call from the flight deck is indicated by which combination?

• A. A flashing light is observed and a three HI/LO tone is heard
• B. A flashing light is observed
• C. A three HI/LO tone is heard
• D. No indication

Answer: (A)

An emergency call from the flight deck is signaled using two cues together: a flashing light and a three HI/LO tone. The flashing light grabs attention visually, while the three-tone pattern provides a clear, urgent audible alert that this is a flight-deck emergency call. Using both cues together ensures the signal is noticed quickly and unambiguously, even if one cue is missed or if ambient noise or lighting affects one channel. Relying on just the light or just the tones could lead to confusion with other non-emergency alerts, and no indication would mean there’s no call at all. When you see the flashing light and hear the three HI/LO tones, treat it as an urgent emergency call and respond per procedures.