What action must be taken when a hazardous item is suspected on board?

When a hazardous item is suspected on board, it is essential to notify the Pilot-in-Command (PIC) immediately. The PIC has the ultimate responsibility for the safety of the aircraft, its crew, and passengers. Reporting to the PIC ensures that the situation is evaluated properly, and necessary actions can be taken swiftly to manage any risks associated with the hazardous item.

The PIC is trained to handle emergencies and assess potential threats, and they can make informed decisions about how to proceed with the flight, including notifying relevant authorities or potentially diverting the aircraft if deemed necessary. Prompt communication with the PIC is crucial for effective incident management and maintaining safety standards on board.