Passenger Service Unit

PSU is the common abbreviation for aviation in the Passenger Service Unit, ie the " passenger service unit ". You can find sometimes in adapted form modified on trains, buses and passenger ships use.

Components

It is installed in widebody jets in the pressurized cabin on every passenger seat row. It contains among other things, reading lights, speakers, oxygen masks that fall in pressure drop from an orifice, and in accordance with illuminated information signs, such as the seatbelt sign, the non- smoking display and in some aircraft also a sign back to the place. In addition, there is often still a speaker ( audio system ) for the announcements of the staff.