What action should a CSA take if they suspect an emergency during check-in?

When a CSA suspects an emergency during check-in, the most appropriate action is to notify security personnel immediately. This is vital because security personnel are trained to handle emergencies, ensuring the safety of all passengers and staff. By alerting them right away, the CSA not only triggers an appropriate response but also ensures that trained professionals can assess the situation quickly and effectively, reducing the risk of harm.

Maintaining a secure environment is crucial in any emergency, and security personnel can implement necessary measures, such as evacuation if required or containing the situation safely. This response prioritizes the safety of everyone involved and aligns with protocols that are typically in place for emergency situations in airports.

The other actions may not effectively address the urgency of the situation. Continuing to process passengers, for instance, could potentially put individuals at risk or escalate the emergency. Asking passengers to stay calm can be part of an overall response but is not a definitive action to address a suspected emergency. Closing down the area for safety, while it may seem prudent, typically falls under the purview of security or emergency response teams rather than the CSA. Therefore, notifying security personnel is clearly the most appropriate and immediate course of action.