What does PSU represent in airplane terminology?

In airplane terminology, PSU represents Passenger Service Unit. This unit is located above the passenger seats and contains essential equipment that enhances the comfort and convenience of passengers during a flight. It typically includes reading lights, air supply vents, and oxygen masks, among other features.

The Passenger Service Unit plays a vital role in ensuring a pleasant flying experience by providing passengers easy access to comfort controls and safety equipment. This is particularly important during boarding, in-flight service, and emergency situations, where having readily available information and equipment can help maintain passenger safety and satisfaction. Understanding the function and importance of the Passenger Service Unit helps flight attendants efficiently assist passengers and manage in-flight service.