What causes the aural indication of a flashing ORANGE light?

The aural indication of a flashing orange light is associated with the lavatory (LAV) fire protection alarm system. This specific alert is crucial for ensuring passenger and crew safety by promptly indicating potential fire hazards in the lavatory area. The orange light serves as a warning signal, complemented by auditory alerts to capture immediate attention in a potentially serious situation.

In the context of other options, while the emergency communication system might also have lights and signals, it typically does not involve a flashing orange indicator specifically tied to a fire risk. Similarly, a cabin pressure alert would involve a different signaling mechanism, primarily associated with pressure changes rather than fire threats. The passenger call button, although it is important for communication, does not trigger an orange light for fire protection purposes, as its function is solely to alert crew members of a passenger’s need for assistance.