Passenger service unit
Page Module:Message box/ambox.css has no content.
This article needs additional citations for verification. (March 2026) |
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 for announcements, illuminated signs (to remind people that the cabin is a no-smoking zone and to wear a seatbelt), buttons to call for assistance (though these are mounted on the armrest on some aircraft), air condition vents, and automatically deployed oxygen masks in case of cabin depressurisation.[1]
May be absent or simplified on the smallest regional aircraft or on some very early-generation airliners [2]
References
Page Template:Reflist/styles.css has no content.
- ^ Page Module:Citation/CS1/styles.css has no content."Master Minimum Equipment List (MMEL) Guidance Book" (PDF). Transport Canada. Government of Canada. July 2023. Retrieved 2026-03-01.
- ^ Page Module:Citation/CS1/styles.css has no content."Passenger Service Unit (PSU)". SKYbrary Aviation Safety. EUROCONTROL / Aviation Safety Network. Retrieved 2026-03-01.
Lua error in package.lua at line 80: module 'Module:Navbox/configuration' not found.
