What is one of the responsibilities of aircraft crew members under the PIC's authority?

One of the key responsibilities of aircraft crew members under the authority of the Pilot-in-Command (PIC) is to be trained to handle various emergencies. This training is crucial for ensuring the safety of all passengers and crew on board, as it equips the crew with the skills necessary to respond to a range of potential situations, including medical emergencies, security threats, and aircraft malfunctions.

The need for crew members to be adept in emergency management cannot be overstated, as their actions during such events can significantly impact the outcome. Effective training includes protocols for evacuating passengers, administering first aid, and coordinating with the PIC and ground support. These competencies enhance the operational safety of flights and demonstrate the crew’s preparedness to handle unexpected adverse situations.

The other options do not accurately reflect the responsibilities that crew members have under the PIC's authority. For example, while they may assist with boarding procedures, the authority to deny passengers boarding ultimately rests with the PIC or the airline's policies. Crew members are not responsible for law enforcement training; rather, they focus on operational safety and customer service. Additionally, crew members are empowered to request assistance from law enforcement officers (LEOs) when necessary, especially when it concerns the safety and security of the aircraft and passengers.