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 for announcements, illuminated signs (to remind people that the aircraft 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. These are not found on the smallest of feederliners, or on older aircraft. [citation needed]
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Aircraft components and systems
- Aft pressure bulkhead
- Cabane strut
- Canopy
- Crack arrestor
- Cruciform tail
- Dope
- Empennage
- Fabric covering
- Fairing
- Flying wires
- Former
- Fuselage
- Hardpoint
- Interplane strut
- Jury strut
- Leading edge
- Lift strut
- Longeron
- Nacelle
- Rib
- Spar
- Stabilizer
- Stressed skin
- Strut
- T-tail
- Tailplane
- Trailing edge
- Triple tail
- Twin tail
- V-tail
- Vertical stabilizer
- Wing root
- Wing tip
- Wingbox
- Aileron
- Airbrake
- Artificial feel
- Autopilot
- Canard
- Centre stick
- Deceleron
- Dive brake
- Dual control
- Electro-hydraulic actuator
- Elevator
- Elevon
- Flaperon
- Flight control modes
- Fly-by-wire
- Gust lock
- HOTAS
- Rudder
- Rudder pedals
- Servo tab
- Side-stick
- Spoiler
- Spoileron
- Stabilator
- Stick pusher
- Stick shaker
- Trim tab
- Wing warping
- Yaw damper
- Yoke
devices
- Active Aeroelastic Wing
- Adaptive compliant wing
- Anti-shock body
- Blown flap
- Channel wing
- Dog-tooth
- Drag-reducing aerospike
- Flap
- Gouge flap
- Gurney flap
- Krueger flap
- Leading-edge cuff
- Leading-edge droop flap
- LEX
- Slats
- Slot
- Stall strips
- Strake
- Variable-sweep wing
- Vortex generator
- Vortilon
- Wing fence
- Winglet
instrument systems
- ACAS
- Air data boom
- Air data computer
- Aircraft periscope
- Airspeed indicator
- Altimeter
- Annunciator panel
- Astrodome
- Attitude indicator
- Compass
- Course deviation indicator
- EFIS
- EICAS
- Flight management system
- Glass cockpit
- GPS
- Head-up display
- Heading indicator
- Horizontal situation indicator
- INS
- ISIS
- Multi-function display
- Pitot–static system
- Radar altimeter
- TCAS
- Transponder
- Turn and slip indicator
- Variometer
- Yaw string
devices and fuel systems
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