Flight Controls Flashcards
Different rudder operation modes……..
Powered
Manual
Powered - Normally the rudder is powered by the right hydraulic system
Manual - If the right hydraulic pressure is to low or manual mode is selected, the rudder control tab unlocks.
What happens in rudder manual mode…..
The rudder pedals move the control tab on the rudderr and aerdynamic forces on the control tab move the rudder.
What does pushiong the RUDDER TRIM CENTER switch do
Automatically resets the rudder to zero.
What does the rudder trim knob do……
Moves the rudder left/right
What does the rudder limiter do……
Protects the empennage from excessive loads by restricting rudder travel as airspeed increases.
How is the Primary Rudder Limiter operated…..
Mechanically operated by ram air pressure from a pitot tube on the leading edge of the verticle stab.
What does the Second Rudder Restricting System……
Provides rudder limiting in the event of a primary fail. Has two positions…
Restricted and unrestricted controlled by the flight control computer as a function of airpseed.
What happens if the speed brakes are extended and the throttles are advanced to a high thrust setting…..
Speed brakes will automatically retract, speed brake handle will remain in the same position, can be verified on the CONFIGURATION SD
What does the FLAP/SLAT control handle do….
UP/RET - Retracts or extends thge flaps
What are the flap settings? (4)
0,13,18,25,40
What does the FLAP T.0 SEL Thumbwheel do
Sets a adjusted detent for flap postion for optmum takeoff or landing performance
What does FLAP T.O SEL Postion Indicator Window do…..
Responds to movement of FLAP T.O. SEL thumbwheel to indicate the selected flap setting
Where are FLAP/SLAT position displayed…..
FLAPS
SLAT EXT
On SD Configuration and displayed on PFD’S
FLAPS - Displayed under the wing on the SD
SLAT EXT - Displayed under the fuselage
What happens to the SLATS indication on the PFD when FLAPS are extended….
Its removed
What happens on the PFD when the FLAPS/SLATS are in transit…..
Displayed on PFD’S with a UP OR DOWN arrows indicating the direction of the flap/slat movement
How are SLATS powered…..
By both hydraulic systems but either hydraulic system can power them in the event of a failure
How many slat sections are on each wing and how to they operate…..
5 individaul sections on each wing and they operate as a single unit
Where do you extend slats and what are their postions
FLAP/SLAT handle
UP/RET and EXT
Where is the Stablizer trim displayed
Configuration SD and Secondary Engine SD Synoptic
How is Horizontal stab trim controlled……
By the primary trim switches, the alternate trim switches or the autopilot
What are the primary trim switches on the control wheel for…..
For manual stab timming at a faster rate
What are the alternate trim switches (ALT LONG TRIM) on the pedistal used for….
For manual stabilizer trimming at a reduced rate
How does the autopilot trim the airplane
Alternate trim system
How is the stablizer trimmed with the primary trim switches….
When the trim switches are moved together, the trim moves in the commanded direction
Seperate movement of the switches will not command movement
What does the stab movement warning horn do….
Alerts the crew any time the stab moves more than 1 degree and continues following each degree.
The stabilizer motion voice warning also sounds.
Both are inhibited on the ground
What does the STABILIZER TRIM switch do….
NORMAL
OFF
NORMAL- OFF light is extinguished and primary stab trim is enabled
OFF- (Switch is pushed) Amber off illuminates and electrical power to the brake is removed, setting the brake eto prevent stabilizer movement.
How are the elevators positioned for pitch control….
Elevators are aerodynamically positioned by control tabs, which are mechanically connected to the control columns
A variable load feel mechanism simulates aerodynaically forces anbd returns the control column to an artificial center postion when they are released
What are the two elevator tabs….
Control Tabs - Operated by the control columns, then aerodynamically postion the elevators
Geared Tabs - As the elevator is moved, geared tabs are deflected, providing aerodynamically assitance is moving the elevators.
How many control tabs are on the elevators
4, two on each side
How is pitch controlled maintained in the event of a control jam……
Brake the torque tube with 130 lbs of pressure to make the column operate independently
Maintenace is required opnce disconnected
What does the Elevator Augmentation System consists of….
Two hydraulic boost cylinders that augment elevator control during a deep stall recovery, providing additional nose down capability
Where does the Elevator Augmentation System get is power from……
Left hydraulic system with an accumulator backuo in the event of a loss of pressure
What happens when the elevator augmentation system is activated by pushing the control wheel down
Elevators move to full defelection, trailing edge down
What is the function of the spoilers (3)
- Roll Augmentation
- Speed Brakes
- Decrease lift and increase drag on rejected takeoff or landing roll
How are spoilers controlled…..
Electricall controlled by Spoiler Electronic controk unit and hydraulically powered.
How is roll control accomplished using ailerons and spoilers……
Ailerons are aerodynamically posistioned by control tabs mechanically connected to the control wheel
Aerodynamic forces on the control tabs position the ailerons
How are the ailerons trimmed…..
Trim tab outboard of the control tab on eahc aileron
What happens with more than 5 degrees of control wheel input……..
The flight spoilers extend a proportionate amount on the downward moving wing for greater roll
What doe the AILERON TRIM switches do
Operate the trim tabs for LEFT WING DOWN/RIGHT WING DOWN control
How is roll control maintained with a control wheel jam….
Linked with a torque tube and an overide mechanism.
In the event on control or cable system becomes jammed, roll control is still possiblewith the other control tab by overriding the jammed component
When will ground spoilers auto deploy………
Rejected takeoff or on landing roll if
What conditions allow the spoilers to auto deploy
Switch in AUTO and…….
Reverse thrust is selected in a rejected takeoff
When landing, main wheel spin-up or a ground shift signal from the nose gear deploys the spoilers.
In the event of a stall what does the stick pusher do…..
STICK PUSHER PUSH TO INHIBIT LIGHT illuminates.
Auto pilot if in use, disconnects
Abrupt forward movement of both control columns occurs, followed by stick shacker deactivation
Forward pressure on the control columns continues until AOA is reduced below stick shacker or the STICK PUSHER PUSH TO INHIBIT BUTTON IS PUSHED
Does the flight crew have to ability to override the stick pusher?
Yes, by pushing the switchlight.
Can manually be overridden by pulling on the control column. If the stall still exist, the sitck pusher will force the column over again.
