Who has the authority to decide on a potential diversion or evacuation during a security threat?

• A. The lead flight attendant.
• B. The flight deck.
• C. The passengers.
• D. Ground security liaison.

Answer: (B)

In-flight security decisions about diverting or evacuating are made by the flight deck, with the captain holding the ultimate responsibility for everyone on board. When a threat is identified, the captain evaluates the situation, determines whether a diversion to the nearest suitable airport is needed, may declare an emergency, and can order an evacuation if it’s required for safety. The flight crew on the deck coordinates with air traffic control and airline operations to arrange a safe landing and security response.

The lead flight attendant and cabin crew execute the procedures and carry out evacuations under the captain’s direction, but they don’t independently decide to divert or evacuate. Passengers do not have authority in this decision. Ground security liaison supports post-landing actions and coordination with authorities, but in the air the captain’s authority directs any diversion or evacuation.