What is the CC response on hearing the smoke detector?

• A. Check the toilet and, if no smoke present, switch it off by pressing the reset button
• B. Evacuate passengers
• C. Silence the alarm from the cockpit
• D. Notify the flight deck

Answer: (A)

When a lavatory smoke detector sounds, the fastest, safest response is to verify the situation by inspecting the lavatory for smoke. If no smoke is found, the appropriate action is to reset the detector using the reset button in the lavatory to silence the alarm and restore normal operation. This approach tackles a potential false alarm without unnecessary disruption or alarm fatigue, while keeping safety in mind.

Evacuating passengers would be excessive unless there is confirmed smoke or fire. Silencing the alarm from the cockpit isn’t how this system is reset; the dedicated reset is performed at the lavatory. After confirming no smoke, you would still follow standard procedures to inform the flight deck, but the immediate action on hearing the detector is the lavatory check and reset.