Passenger service unit

A passenger service unit (PSU) is an aircraft component situated above each row in the overhead panel above the passenger seats in the cabin of airliners. Among other things, a PSU contains reading lights, loudspeakers, illuminated signs, air condition vents, and automatically deployed oxygen masks.

单词	Passenger service unit
释义	Passenger service unit 英语百科 Passenger service unit A passenger service unit (PSU) is an aircraft component situated above each row in the overhead panel above the passenger seats in the cabin of airliners. Among other things, a PSU contains reading lights, loudspeakers, illuminated signs, air condition vents, and automatically deployed oxygen masks.
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