Thrust lever

Thrust levers in a Boeing 747 Classic. The center and rear levers are used during flight, while the forward levers control reverse thrust.

Thrust levers or power levers are found in the cockpit of aircraft, and are used by the pilot, copilot, or autopilot to control the thrust output of the aircraft's engines.

In multi-engine aircraft, each thrust lever displays the engine number of the engine it controls. Normally, there is one thrust lever for each engine. The thrust levers are normally found in the aircraft's center console, or on the dashboard of smaller aircraft.

For aircraft equipped with thrust reversers, the control for each thrust reverser is usually found adjacent to the corresponding engine's thrust lever.

The position of each lever can be described by the current angle indicated. This is referred to as the Throttle Lever Angle or TLA. The greater the TLA, the greater the engine thrust.

Throttle levers

The throttle lever assembly is often designed to incorporate high-pressure (HP) cock switches so that the pilot has instinctive control of the fuel supply to the engine. Microswitches are located in the throttle box so that the throttle levers actuate the switches to shut the valves when the levers are at their aft end of travel. Pushing the levers forward automatically operates the switches to open the fuel cocks, which remain open during the normal operating range of the levers. Two distinct actions are required to actuate the switches again. The throttle lever must be pulled back to its aft position and a mechanical latch operated, or a detent (hard point) overcome, to allow the lever to travel further and shut off the fuel valve.

Types	Propfan Turbofan Turbojet Turboprop Turboshaft

Mechanical components	Accessory drive Afterburner (reheat) Axial compressor Centrifugal compressor Combustor Constant speed drive Propelling nozzle Turbine blade

Terminology	Aircraft engine starting Bypass ratio Compressor stall Engine pressure ratio (EPR) Flameout Windmill restart

Propellers

Components	Propeller governor Propeller speed reduction unit

Terminology	Autofeather Blade pitch Constant-speed Contra-rotating Counter-rotating Proprotor Scimitar Variable-pitch

Engine
instruments

Engine controls

Fuel and induction
systems

Jet fuel

Other systems

Aircraft components and systems

Airframe structure	Aft pressure bulkhead Cabane strut Canopy Cruciform tail Dope Empennage Fabric covering Fairing Flying wires Former Fuselage Hardpoint Interplane strut Jury strut Leading edge Lift strut Longeron Nacelle Rib Ring tail Spar Stabilizer Stressed skin Strut T-tail Tailplane Trailing edge Triple tail Twin tail Vertical stabilizer V-tail Y-tail Wing root Wing tip Wingbox

Flight controls	Aileron Airbrake Artificial feel Autopilot Canard Centre stick Deceleron Dive brake Electro-hydraulic actuator Elevator Elevon Flaperon Flight control modes Fly-by-wire Gust lock Rudder Servo tab Side-stick Spoiler Spoileron Stabilator Stick pusher Stick shaker Trim tab Wing warping Yaw damper Yoke

Aerodynamic and high-lift devices	Active Aeroelastic Wing Adaptive compliant wing Blown flap Channel wing Dog-tooth Droop Flap Gouge flap Gurney flap Krueger flap Leading edge cuff LEX Slats Slot Stall strips Strake Variable-sweep wing Vortex generator Vortilon Wing fence Winglet

Avionic and flight instrument systems	ACAS Air data computer Airspeed indicator Altimeter Annunciator panel Attitude indicator Compass Course deviation indicator EFIS EICAS Flight data recorder Flight management system Glass cockpit GPS Heading indicator Horizontal situation indicator INS Pitot-static system Radar altimeter TCAS Transponder Turn and slip indicator Vertical Speed Indicator Yaw string

Propulsion controls, devices and fuel systems	Autothrottle Drop tank FADEC Fuel tank Gascolator Inlet cone Intake ramp NACA cowling Self-sealing fuel tank Splitter plate Throttle Thrust lever Thrust reversal Townend ring Wet wing

Landing and arresting gear	Arrestor hook Autobrake Conventional landing gear Drogue parachute Landing gear Landing gear extender Oleo strut Tricycle landing gear Tundra tire

Escape systems	Ejection seat Escape crew capsule

Other systems	Aircraft lavatory Auxiliary power unit Bleed air system Deicing boot Emergency oxygen system Entertainment system Environmental control system Hydraulic system Ice protection system Landing lights Navigation light Passenger service unit Ram air turbine Weeping wing

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Thrust lever

Throttle levers

See also