What action must be taken if a suspicious item is discovered?

When a suspicious item is discovered, the correct action is to alert the Pilot in Command. This is crucial because the Pilot in Command has the ultimate responsibility for the safety of the flight and the passengers on board. By notifying the pilot, appropriate measures can be taken quickly to assess the situation, which could include diverting the flight, contacting security, or preparing for an emergency landing if deemed necessary.

This protocol is consistent with aviation safety practices, which prioritize clear communication and the chain of command in the event of any potential threat. Additionally, the Pilot in Command can make informed decisions based on the overall context of the situation and advise the relevant authorities or ground crew on how to proceed safely.

Other actions such as ignoring the item, simply reporting it to the ground crew, or conducting a search after the flight do not account for the immediate need for action and communication necessary in a potentially dangerous situation.