What does PSU stand for in relation to aircraft?

The term "PSU" in relation to aircraft stands for Passenger Service Unit. This component is crucial for passenger comfort and safety during a flight. The PSU is typically located above each passenger seat and includes essential features such as oxygen masks, reading lights, air vents, and sometimes even flight information displays.

The design of the PSU allows for each passenger to have easy access to these vital services, particularly the oxygen masks, which are deployed in the event of cabin depressurization. The unit plays a significant role in ensuring passengers are provided with necessary services and safety measures throughout their flight experience.

Understanding the function of the Passenger Service Unit is important for anyone involved in aircraft operations as it directly relates to passenger safety and service quality during a flight.