If a passenger appears to be intoxicated, whom should you notify?

Notifying the Captain or the Flight Deck is the most appropriate action when a passenger appears to be intoxicated. The Captain has the overall responsibility for the safety and security of everyone on board the aircraft, and they are equipped to make critical decisions regarding the situation, including whether to allow the passenger to board, or if necessary, to take further action during the flight.

The Captain relies on input from crew members to ensure that all safety protocols are followed. If a crew member observes a passenger showing signs of intoxication, it’s essential to report this directly to the Captain as they can assess the situation in the context of the flight's safety and manage it accordingly.

This process not only helps maintain a safe environment on the aircraft but also aligns with airline policies, which generally dictate that any serious concerns regarding passenger behavior must go up to the Captain for appropriate handling.