What does PSU stand for in aircraft terminology?

In aircraft terminology, PSU stands for Passenger Service Unit. This unit is an essential component located above passenger seats in the cabin area of an aircraft. It typically contains various features that enhance passenger comfort and safety, such as individual reading lights, air nozzles for personalized airflow, and communication systems like the call button for crew assistance.

Understanding the function and importance of the Passenger Service Unit is crucial for flight attendants, pilots, and maintenance crews, as it plays a key role in the overall passenger experience during flights. The PSU is designed to provide convenience and comfort, which is essential in maintaining a pleasant travel environment while ensuring efficient response in case of emergencies.