What action is crucial after assessing a security issue on board?

Following the airline’s security protocols is essential after assessing a security issue on board because these protocols are designed to ensure the safety and security of passengers and crew during potentially dangerous situations. Each airline, including United Airlines, has specific procedures that outline how to respond to various security threats, which may involve communication with authorities, implementing safety measures, and managing passenger behavior.

By adhering to these established protocols, the crew can systematically address the issue, mitigate risks, and make informed decisions about the next steps. These procedures often encompass multiple actions tailored to the specific threat, ensuring that responses are consistent and effective. This approach helps maintain order and safety until the situation is resolved, aligning with best practices for onboard safety management.

Other actions, while possibly relevant, do not encompass the full scope of required responses to a security issue in the same way that following established protocols does. For example, merely switching off on-board entertainment may not adequately address a potential threat, nor would it provide a comprehensive response to the security issue at hand. Thus, the importance of following security protocols cannot be overstated in these situations.