Airbus A320 – Flight Controls - SmartCockpit - Airline training guides, Aviation, Operations, Safety

In the case of an extraordinary unpredictable external event (e.g. mid-air collision) the flight parameters may go far beyond the limits of the protected envelope. In this case, specific control laws are activated to ensure aircraft recovery, and to allow a safe continuation of the flight. This is called “Abnormal Attitude Law”.

False.

True.

Correct! Wrong!

There are ten spoilers (five each side) and they have several functions, each using different surfaces:

Speed brakes use the 3 central surfaces to increase drag.

Ground spoilers deploy all spoilers to dump lift to get weight on the wheels.

Roll control use the four outer spoilers to assist in rolling the aircraft.

All statements are correct.

Correct! Wrong!

What control surfaces do the FACs control?

All statements are correct.

The rudder.

The spoilers.

The elevators.

Correct! Wrong!

The ground spoilers retract:

During a touch and go, when at least one thrust lever is advanced above 20 degrees.

After landing.

After a rejected takeoff, when the ground spoilers are disarmed.

All statements are correct.

Correct! Wrong!

In Normal Law, what are the limits of Pitch Attitude protections with flaps Full.

25 degrees nose up, progressively reduced to 20 degrees at low speed.

30 degrees nose up.

35 degrees nose up progressively reduced to 20 degrees.

There is no limit.

Correct! Wrong!

Seven flight control computers process pilot and autopilot inputs according to normal, alternate, or direct flight control laws.

True.

False.

Correct! Wrong!

There are 2 ELACs (Elevator Aileron Computer), 3 SECs (Spoilers Elevator Computer), 2 FACs (Flight Augmentation Computer).

When deploying flaps when airborne, selecting 1 on the flap lever only moves the slats - i.e. configuration 1 is achieved rather than 1+F.

False.

True.

Correct! Wrong!

The FLAP lever sends signal to Slat Flap Control Computer (SFCC) to command movement.

True.

False.

Correct! Wrong!

Mechanical control of the THS is available from the pitch trim wheel at any time if:

Either the green or yellow hydraulic system is functioning.

The ELAC2 is operative.

Both the green and yellow hydraulic system are functioning.

Correct! Wrong!

Is there any rudder pedal feedback for the yaw damping and turn coordination functions?

No.

Yes.

Correct! Wrong!

The ailerons, elevators and pitch trim are powered by three independent actuators, each powered by a separate hydraulic source.

True.

False.

Correct! Wrong!

The ailerons, elevators and pitch trim are powered by two independent actuators, each powered by a separate hydraulic source.

Can the crew make a flight control input that will over-stress the airplane in direct law?

No. The system is designed to avoid such an attempt.

Yes, there are no protections provided in direct law.

Correct! Wrong!

Which of the following controls and monitors flaps and slats?

One slat flap control computer (SFCC).

Two Elevator and Ailerons Computers (ELACs).

Wing tip brakes.

Two slat flap control computers (SFCCs).

Correct! Wrong!

Following nosewheel touchdown, as the pitch attitude becomes less than 2.5 degrees for more than 5 seconds, pitch trim is automatically reset to zero.

False.

True.

Correct! Wrong!

This function is inoperative, when the green or yellow hydraulic system is not pressurized.

What happens in the event of a single ELAC failure?

The functions of the failed ELAC will be assumed by the remaining ELAC.

SEC functions are transferred the ELACs.

ELAC functions are transferred to FACs.

ELAC functions are transferred the SECs.

Correct! Wrong!

ALPHA/SPEED LOCK FUNCTION - This function inhibits slat retraction at high angles-of-attack and low speeds or high speeds.

False.

True.

Correct! Wrong!

This function inhibits slat retraction at high angles-of-attack and low speeds.

Once activated the wing tip brakes:

Lock only the flaps in their current position.

Lock only the slats in their current position.

Lock both the slats and flaps in their current position.

Lock only the affected high lift system surfaces in their current position.

Correct! Wrong!

Elevator actuation - Two electrically controlled hydraulic servojacks drive each elevator.

The two jacks are used simultaneously.

One jack is used during normal law and the other jack is used in alternate law.

In normal operation one jack is in active mode. The other jack is in damping mode. Some maneuvers cause the second jack to become active.

Correct! Wrong!

If the active servojack fails, the damped one becomes active, and the failed jack is automatically switched to damping mode.

Which of the following statements best describes the Load Alleviation function (LAF)?

Relieves wing structure loads by deflecting the ailerons.

Helps the pilot control the airplane.

Relieves wing structure loads by deflecting the ailerons and spoilers.

Relieves wing structure loads by deflecting only the spoilers.

Correct! Wrong!

Sidesticks provide electrical signals to the flight control computers. If both sidesticks are operated together:

The CM2 input is overridden by the CM1 input.

The inputs cancel each other.

Both inputs are algebraically added.

The CM1 input is overridden by the CM2 input.

Correct! Wrong!

If this happens, a "DUAL INPUT" aural warning is activated and green lights show on the SIDE STICK PRIORITY warning lights. Dual inputs are not recommended.

Mechanically backed-up control surfaces:

All statements are correct.

Require hydraulic power for actuation.

Are mechanically connected to the cockpit controls.

Correct! Wrong!

Turn coordination is available in Alternate Law.

False.

True.

Correct! Wrong!

What is true concerning the side stick takeover push button?

If the takeover push button is depressed for more than 40 seconds, the onside system will retain priority after the push button is released.

All statements are correct.

The last pilot to depress the push button has priority.

Correct! Wrong!

Let’s assume the F/O presses his takeover pushbutton and releases it after more than 40 seconds.

The Captain’s side stick is active as long as the F/O’s side stick is in neutral position.

The Captain is unable to re-activate his side-stick for the rest of the flight.

Both sticks are active.

The Captain’s side stick is de-activated unless he presses his takeover pushbutton.

Correct! Wrong!

Selection of flaps 1 in flight will select which of the following configurations?

Slats 1 and flaps 0 (1).

Slats 1 and flaps 5 (1+F).

Slats 0 and flaps 1 (0+F).

Slats 1 and flaps 1 (1+F).

Correct! Wrong!

In Pitch Alternate Law the low Speed stability (nose down command) can be overridden by the sidestick.

False.

Correct! Wrong!

Can the rudders be moved with both FAC’s inoperative?

No.

Yes, if both FACs fail, maximum rudder deflection can be obtained when the gear is extended or flaps extended at 1 minimum.

Yes, if both FACs fail, maximum rudder deflection can be obtained.

Yes, if both FACs fail, maximum rudder deflection can be obtained when the slats are extended.

Correct! Wrong!

The maximum deflection of the spoilers is:

90 degrees.

35 degrees.

60 degrees.

45 degrees.

Correct! Wrong!

With the aircraft in Pitch Alternate Law, roll is in _____ Law.

Alternate.

Direct.

Normal.

Correct! Wrong!

In normal law, if one stick is rapidly pulled fully back, can the aircraft’s maximum allowable “G” load be exceeded?

Yes, until maximum pitch attitude is reached.

No. The load factor limitation overrides side stick commands to avoid excessive “G” loads.

No. At Maximum “G” load, the side sticks are de-activated for 5 seconds.

Yes. Rapid side stick deflection must never be made.

Correct! Wrong!

What condition will cause auto flap retraction?

Exceed 210 kts at Flaps 1.

Exceed 190 kt with Flaps 1 while extending the speedbrake lever.

Exceed 190 kt at Flaps 1.

Exceed 195 kt at Flaps 1

Correct! Wrong!

When is the Flight Mode active?

From liftoff until flare mode engages at 50 ft RA.

From takeoff until landing.

From takeoff until passing 50 kt on landing (main shock absorbers depressed).

From liftoff until landing.

Correct! Wrong!

In pitch normal law, the elevator control changes from the normal mode to a protection mode when the angle of attack is greater than:

Alpha Floor.

Alpha Prot.

Alpha Max.

Correct! Wrong!

What happens to high speed (VMO/MMO) when you are in Alternate Law?

VMO is reduced to 330 kt and MMO minus 10 kt.

VMO is reduced to 320 kt and MMO does not change.

There is no change.

VMO is reduced to 320 kt and MMO minus 10 kt.

Correct! Wrong!

The wing tip brakes are:

Hydraulically actuated.

Mechanically controlled, hydraulically actuated.

Electric brakes.

Electrically actuated.

Correct! Wrong!

When is alpha floor not available?

If the A/THR is deactivated or unavailable.

Out of normal law.

All statements are correct.

Below 100 feet RA in landing configuration.

Correct! Wrong!

When A.FLOOR protection is active, this will be indicated in the left most FMA on the PFD in green with a flashing amber box around it.

In the event of a complete loss of electrical flight control signals, the airplane reverts to a _____ mode.

Alternate Law.

Abnormal Attitude law.

Mechanical.

Correct! Wrong!

FAC generated slat and flap extension, retraction, and limiting speeds are visually displayed on which of the following?

The lower ECAM F/CTL page.

The MCDU perf page.

All statements are correct.

Both pilot’s PFD airspeed displays.

Correct! Wrong!

Can you manually trim the rudder with the autopilot engaged?

Yes.

No.

Correct! Wrong!

The rudder trim rotary selector has no effect, when the autopilot is engaged.

What happens in the side stick-neutral high speed protection mode?

The autopilot disengages, bank angle limit is 35 degrees and the aircraft rolls wings level and pitches to 10 degrees to slow down to VMO/MMO - 20 kt.

The autopilot disengages, bank angle limit is 30 degrees and the aircraft is 25 degrees roll limited.

The autopilot disengages, bank angle limit is 40 degrees and the aircraft rolls wings level and pitches up to slow down to VMO/MMO.

The autopilot disengages, bank angle limit is 45 degrees and the aircraft is 25 degrees roll limited.

Correct! Wrong!

Selection of flaps one prior to takeoff will select which of the following?

Slats 1 and flaps 0.

Slats 1 and flaps 1 (1+F).

Slats 1 and flaps 5.

Slats 0 and flaps 1 (0+F).

Correct! Wrong!

What is the maximum flap setting for in-flight use of the spoilers?

Flaps 3.

Flaps 10.

Spoilers are not approved for in-flight use.

Flaps FULL.

Correct! Wrong!

Failure to retract the flaps after takeoff will:

Activate the wing tip brakes.

Result in automatic flap and slat retraction at 210 kt.

Result in automatic flap and slat retraction at 220 kt.

Result in automatic flap retraction at 210 kt.

Correct! Wrong!

What happens if you release the stick at 40 degrees of bank?

The aircraft rolls back to 25 degrees.

The bank stays at 40 degrees.

The aircraft rolls back to 33 degrees and resumes flight path stability.

The aircraft rolls back to a bank angle less than 29 degrees.

Correct! Wrong!

In direct law, there is a direct relationship between side stick and con troll surface positions.

There are no protections available, although stall and overspeed warnings are still available.

There are no protections available, although stall warning is still available.

There are no protections available.

Correct! Wrong!

The alpha speed lock function:

Will inhibit slat retraction during an inadvertent movement of the flap selector at high AOA or low speeds.

Will inhibit flap retraction during an inadvertent movement of the flap selector at high AOA or low speeds.

Automatically raises the flaps if retraction has not been accomplished by 210 kt.

Correct! Wrong!

If both pilots deflect their side sticks fully back:

The "pitch up" order is twice as high as with only one stick deflected.

The "pitch up" order is equal to a single stick deflection.

No inputs are sent to the flight control computers unless one pilot presses the takeover pushbutton on his stick.

The "pitch up" order is 1.5 times higher as high as with only one stick deflected.

Correct! Wrong!

What kind of protections are provided if the aircraft is in Alternate Law?

G-load protection with a reduced factor.

Full G load protection and speed stability

Speed Stability

G-load protection and speed stability if the ADIRS and elevators are working.

Correct! Wrong!

Two control surfaces that have mechanical backup are:

Elevator and rudder.

Horizontal stabilizer and rudder.

Speed brakes and rudder.

Correct! Wrong!

With an elevator fault, the remaining elevator remains operative, but its deflection limits are reduced to prevent excessive torsional loads on the tail. Normal flight is possible in this configuration. If the elevators are lost entirely, they are automatically set to the neutral position.

True.

False.

Correct! Wrong!

Which of the following will automatically reset after landing?

THS.

Rudder trim.

Ailerons trim.

THS and rudder trim.

Correct! Wrong!

To select speedbrakes inflight, the pilot should:

Push down on the speed brake handle and move it forward.

Push down on the speed brake handle and move it aft.

Pull up on the speed brake handle and move it aft.

Correct! Wrong!

Sideslip target - In the case of an engine failure at takeoff, or at go-around, the sideslip index on the PFD changes from _____.

Blue to white.

Yellow to blue.

White to blue.

White to yellow.

Correct! Wrong!

Should the active elevator actuator fail, elevator control is:

Reduced.

Lost.

Maintained by the other actuator.

Correct! Wrong!

If angle of attack protection is active or flaps are in the configuration Full:

Speed brake extension travel is reduced.

Aileron travel is reduced.

Speed brake extension is inhibited.

Correct! Wrong!

A-LOCK pulsing _____ on the E/WD indicates that the slats have been locked due to high angle of attack and/or low speed

Blue.

Amber.

White.

Green.

Correct! Wrong!

The rudder deflection is limited depending on speed by the rudder travel limiter. The current rudder travel limit is shown on the F/CTL ECAM page by white ticks below the rudder scale.

False.

True.

Correct! Wrong!

If both FAC’s fail, what happens to the rudder limiter?

It immediately assumes the low speed position.

It freezes at its present position and assumes the low speed position when flaps 1 are selected.

Maximum rudder deflection can be obtained after flaps extended.

Maximum rudder deflection can be obtained after slats extended.

Correct! Wrong!

The autopilot will disconnect if the side stick takeover push button is depressed.

True.

False.

Correct! Wrong!

How many actuators are provided to control the ailerons and how many hydraulic sources supply these actuators?

Three hydraulic sources with four actuators.

Two hydraulic sources with four actuators.

One hydraulic source with two actuators.

Four hydraulic sources with four actuators.

Correct! Wrong!

The FAC’s primarily control which control surface?

Rudder.

Elevator and aileron.

Aileron.

Elevator.

Correct! Wrong!

When the flaps are extended, the ailerons:

Pitch up 5 degrees.

Go to the centering mode.

Pitch up 7.5 degrees.

Droop 5 degrees.

Correct! Wrong!

The ailerons extend 5 degrees down when the flaps are extended (aileron droop).

With the autopilot engaged, the FMGC computes the rudder trim orders. The rudder trim rotary switch and the rudder trim reset pushbutton are not active.

False.

True.

Correct! Wrong!

In normal law, what is the maximum bank angle you can reach with the side stick fully deflected?

70 degrees.

33 degrees.

49 degrees.

67 degrees.

Correct! Wrong!

What is the true statement concerning the Spoiler Elevator Computers (SECs)?

Two computers which achieve spoiler control and standby elevator and THS control.

Three computers which achieve spoiler control and normal elevator and THS control.

Three computers which achieve spoiler control and standby elevator and THS control.

Correct! Wrong!

While on the ground in Roll Normal Law there is a direct relationship between sidestick deflection and the corresponding aileron and spoiler deflection.

True.

False.

Correct! Wrong!

Are there any control surfaces with a mechanical backup?

Yes, the ailerons and spoilers.

Yes, the THS and the rudder.

Yes, the spoilers.

Yes, the ailerons.

Correct! Wrong!

If the ground spoilers are armed and the speed exceeds 72 kt, the ground spoilers will automatically extend as soon as both thrust levers are reset to idle.

False.

True.

Correct! Wrong!

Roll control is achieved by:

Two Ailerons and two spoilers on each wing.

Ailerons, rudder and spoilers.

Ailerons.

One aileron and four spoilers on each wing.

Correct! Wrong!

Four hydraulically-operated wing tip brakes are installed to lock the flaps or slats in case of:

Asymmetry and overspeed.

Asymmetry, overspeed, symmetrical runaway and uncommanded movement.

Asymmetry, overspeed and slow movement.

All statements are correct.

Correct! Wrong!

Where does the SFCCs obtain AOA and air data information from?

ADIRU.

ADC.

ELAC.

SEC.

Correct! Wrong!

Automatic pitch trim is provided both on ground and in flight.

False.

True.

Correct! Wrong!

Should both FACs fail, maximum rudder deflection can be obtained after the _____ are extended.

Slats.

Flaps.

Gear.

Correct! Wrong!

Which controls are used for the mechanical backup?

Ailerons and rudder.

Elevators and ailerons.

THS and elevator.

THS and rudder.

Correct! Wrong!

There are _____ that control the aircraft in pitch.

Four elevators.

One elevator and a Trimmable Horizontal Stabilizer (THS).

Two elevators and the Trimmable Horizontal Stabilizer (THS).

Correct! Wrong!

The maximum elevator deflection is 30 degrees nose up, and 17 degrees nose down. The maximum THS deflection is 13.5 degrees nose up, and 4 degrees nose down.

Auto ground spoilers are armed by pulling the spoiler lever up to expose a white collar. A memo on the E/WS confirms arming.

True.

False.

Correct! Wrong!

In Direct Law, the yaw damping is lost but turn coordination is still available. The yaw damping and turn coordination functions are lost.

True.

False.

Correct! Wrong!

What computer normally commands the operation of the elevators and horizontal stabilizer?

FAC 1.

ELAC 2.

SEC 1.

SEC 2.

Correct! Wrong!

ELAC = Elevator Aileron Computer

The message WING TIP BRK ON appears on the E/WD. What does it mean?

To avoid asymmetry, the outer slats are locked in their present position.

Because of the locked flaps, the wing tip brakes also lock the slats.

A hydraulic device locks the flaps in their present position.

To reduce structural stress, the slats movement is being slowed down through the wing tip brakes.

Correct! Wrong!

In Pitch Normal Law Flight Mode, pitch trim is:

Automatic with or without the autopilot engaged.

Automatic as long as the autopilot is engaged.

Manual without the autopilot engaged.

Correct! Wrong!

Flight Control Data Concentrators (FCDC) acquire data from the ELACs and SECs and send it to the electronic instrument system (EIS) and the centralized fault display system (CFDS).

False.

True.

Correct! Wrong!

In normal operations, ELAC1 and ELAC2 control the elevators and the horizontal stabilizer, and the green and yellow hydraulic jacks drive the left and right elevator surfaces respectively.

True.

False.

Correct! Wrong!

In normal operations, only ELAC2 controls the elevators and the horizontal stabilizer, and the green and yellow hydraulic jacks drive the left and right elevator surfaces respectively.

Lift augmentation devices consist of:

Five slats on each leading edge and two flaps on each trailing edge.

Two slats on each leading edge and two flaps on each trailing edge.

Three slats on each leading edge and three flaps on each trailing edge.

Four slats on each leading edge and two flaps on each trailing edge.

Correct! Wrong!

The "SPEED BRK" memo on the E/WD will flash amber if Speed brakes are extended and:

Both engines are above idle or TLA (Thrust Lever Angle) is more than 15 degrees.

Both engines are above idle.

Any engine is above idle.

Any engine is above idle or TLA (Thrust Lever Angle) is more than 15 degrees.

Correct! Wrong!

The ELAC (Elevator Aileron Computer) are for:

Normal, alternate, and direct elevator and aileron control.

Normal and alternate elevator, and aileron control.

Normal elevator, stabilizer control, and aileron control.

Correct! Wrong!

Horizontal stabilizer trim automatically resets to zero degrees after landing.

True.

False.

Correct! Wrong!

What are the rudder trim rates?

Autopilot on = 2,5 degrees /second and Autopilot off = 5 degrees /second.

Autopilot on = 5 degrees / second and Autopilot off = 6 degrees / second.

Autopilot on = 5 degrees per sec and Autopilot off = 1 degree per second.

Autopilot on = 3 degrees / second and Autopilot off = 6 degrees / second.

Correct! Wrong!

If the ground spoilers are not armed and the speed exceeds 72 kt, the ground spoilers will automatically extend as soon as:

Both thrust reversers are selected.

Both thrust levers are reset to idle.

Reverse is selected on one engine (the other thrust lever remains at idle).

Correct! Wrong!

When the landing gear is extended, pitch alternate law:

Degrades to pitch direct law.

Degrades to pitch backup law.

Remains the same.

Correct! Wrong!

You can degrade directly from Normal Law to Direct Law with gear down and a dual radio altimeter fault.

False.

True.

Correct! Wrong!

A screwjack driven by _____ drives the stabilizer.

Three hydraulic motors.

Two hydraulic motors.

One hydraulic motor.

Three hydraulic motors (two active and one standby).

Correct! Wrong!

The two hydraulic motors are controlled by one of three electric motors, or the mechanical trim wheel.

Aileron actuation - Each aileron has two electrically controlled hydraulic servojacks. One of these servojacks per aileron operates at a time. Each servojack has two control modes:

Active: Jack position is controlled electrically. Damping: Jack follows surface movement.

Active: Jack position is controlled hydraulically. Damping: Jack position is controlled electrically.

Normal: Jack position is actuated hydraulically. Damping: Jack is controlled electrically.

Correct! Wrong!

When ground spoilers deploy automatically:

All ten spoiler panels fully deploy.

Four spoiler panels on each wing deploy.

All ten spoiler panels deploy half way.

Six spoiler panels on each wing deploy.

Correct! Wrong!

The spoiler panels are the only flight control surfaces with no redundant control.

True.

False.

Correct! Wrong!

Aileron droop may best be confirmed by checking which of the following?

The lower ECAM FLT/CTL page.

The position of the flap handle.

The position of the ailerons on the exterior preflight inspection.

Correct! Wrong!

On the ground, a combined side stick deflection indicator is shown as a white cross on the attitude indicator. This indicates control surface positions.

True.

False.

Correct! Wrong!

This only indicates side stick positions, not control surface positions.

What happens to the rudder limits if both FAC’s fault?

The limit freezes at the fault condition until Flaps 5 is selected.

The limit freezes at the fault condition until Flaps 1 is selected.

The limit freezes at the fault condition until Flaps 1 is selected. Then it resets to the low speed limits for increased control.

The limit freezes at the fault condition until landing gear is selected down.

Correct! Wrong!

The flight control surfaces are _ controlled and _ actuated.

Hydraulically / mechanically.

Electrically / hydraulically.

Electrically / electrically.

Mechanically / hydraulically.

Correct! Wrong!

Direct law is indicated by the ECAM message FCTL DIRECT LAW (PROT LOST). Auto-trim is not available. A "USE MAN PITCH TRIM" message appears on the FMA. Auto turn coordination and dutch roll damping are also lost.

True.

False.

Correct! Wrong!

Locked flaps or slats may be caused by the Wing Tip Brakes (WTB) locking the affected surface movement if _____ are detected.

Overspeed or uncommanded movement.

Assymmetry, overspeed, or uncommanded movement.

Assymmetry, overspeed, symmetrical runaway or uncommanded movement.

Uncommanded movement.

Correct! Wrong!

If electrical power to a SEC fails:

Half of the spoilers automatically retract.

The affected spoilers automatically retract.

The affected spoilers remain in the last commanded position.

All spoilers automatically retract.

Correct! Wrong!

Which altitude limitation is associated with high lift devices?

Max altitude for extension is 20, 000 ft.

Max altitude for extension is 27, 000 ft.

Max altitude for extension is 25, 000 ft.

Max altitude for extension is 22, 000 ft.

Correct! Wrong!

Automatic rudder trim is provided at the rate of 5 degrees per second while the manual rudder trim rate is _ up to a maximum of _.

1 degree per second - 20 degrees.

10 degrees per second - 15 degrees.

8 degrees per second - 10 degrees.

3 degrees per second - 15 degrees.

Correct! Wrong!

The 2 FACs (Flight Augmentation Computers) are for:

Spoilers control, standby elevator, and stabilizer control.

Normal and standby elevator, and aileron control.

Normal elevator, stabilizer control, and aileron control.

Electrical rudder control.

Correct! Wrong!

In flight mode, control surface deflection is not directly proportional to side stick deflection. Instead, side stick input is a rate of roll demand in roll and a load factor demand in pitch.

False.

True.

Correct! Wrong!

To disable a side-stick, you have to depress the red take-over button on the active stick. Holding the button down for 40 seconds will electrically lock the other stick out until its own red take-over button is pushed again.

True.

False.

Correct! Wrong!

Side sticks - If both priority buttons are pushed, the last pressed will give priority. The opposite sidestick can be permanently deactivated by pressing and holding the button for _____.

40 seconds.

10 seconds.

20 seconds.

15 seconds.

Correct! Wrong!

In this case, a momentary push on either button will reactivate the deactivated side stick.

Which of the following statements is correct concerning the elevator aileron computers (ELACs):

Two computers which achieve normal elevator, stabilizer, and aileron control.

Three computers which achieve normal elevator, stabilizer, and aileron control.

Two computers which achieve normal and standby control of the elevators, ailerons, and trimmable horizontal stabilizer.

Three computers which achieve normal and standby control of the elevators, ailerons, and THS.

Correct! Wrong!

Airbus A320 – Flight Controls