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Jetstar A320/321 > Flight Controls > Flashcards

Flight Controls Flashcards

1
Q

How many FlightControl computers does the A320 have? What are they?

A
  • 7
  • ELAC 1/2 (Elevator Aileron Comp)
  • SEC 1/2/3 (Spoiler Elevator Comp)
  • FAC 1/2 (Flight Augmentation Comp)
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2
Q

Which three flight control computers remain active during an EMER ELEC CONFIG?

A
  • ELAC 1
  • SEC 1
  • FAC 1
    (All on left side of upper panel)
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3
Q

If one flight control, computer fails what happens?

A

The back up computer (ELAC/SEC/FAC) takes over automatically.

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4
Q

What happens if both ELACs fail?

A
  • Flight control laws degrade from normal to alternate law
  • Both ailerons are in operative and roll control is provided by the spoilers
  • elevator and THS control is provided by the SEC’s
  • Both auto pilots will be inoperative
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5
Q

Which spoilers are controlled by SEC 1/2/3?

A
  • SEC1: Spoilers 3/4
  • SEC2: Spoiler 5
  • SEC3: Spoilers 1/2
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6
Q

Which SEC’s provide backup elevator and THS control in case both ELAC’s fail?

A

SEC 1 and 2

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7
Q

What happens if all three SEC’s have failed or are selected off?

A
  • The speed, brakes and spoiler panels are all inoperative and roll is controlled by ailerons only
  • The ability of the FCC’s to provide back up control is lost
  • Flight control laws degrade from normal to alternate law
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8
Q

If all three, SEC’s fail or are turned off what happens to the auto pilot?

A

Nothing as information to the auto pilot is still provided by the ELAC’s and FACs.

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9
Q

What happens if both FAC’s have failed or are selected off?

A
  • Rudder control is through the rudder pedals via mechanical connection
  • Rudder trim, yaw damping, and rudder limiting are lost
  • Flight control laws degrade from normal to alternate law
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10
Q

How long does the priority take over pb need to be pressed to maintain priority without pushing the button?

A

40 sec

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11
Q

Which spoilers also provide roll control?

A

Spoilers 2-5

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12
Q

If one spoiler servo fails what happens?

A

The other side spoiler servo is deactivated to maintain symmetry

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13
Q

If the auto pilot is activated, can the rudder trim selector be used?

A

No, it is deactivated

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14
Q

If both FAC’s fail what happens to rudder travel limit?

A
  • It is initially frozen in the current position
  • rudder travel limit removed when slats are extended for approach
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15
Q

Which spoilers operate as speed breaks?

A

Spoilers 2/3/4

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16
Q

Which spoilers are used for ground spoiler operation?

A

All 5 spoilers

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17
Q

What is the maximum deflection of the speed brakes when auto pilot is engaged?

A

1/2 deflection even if speed brake lever is set to full

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18
Q

If the speed brake lever is in the full position in the auto pilot disengages, what happens?

A

The spoilers rapidly move to full deflection

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19
Q

If the spoilers in the full position in the auto pilot is engaged what happens?

A

The spoilers rapidly moved to the half deflection position

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20
Q

Can the speed brakes be used with flaps full selected?

A

No, speed brake is inhibited with flaps full selected

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21
Q

How are the slats and flaps controlled?

A

Slats and flaps control computer (SFCC)

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22
Q

What is the height limitation to extend slats/flaps?

A

FL200 (do not extend above)

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23
Q

F one SFCC fails what happens?

A

The other SFCC takes over its function, but the slats and flaps operate at half speed

24
Q

At what speed does automatic flap retraction occur?

A

210 kts

25
Q

Do the slats retract when an over speed condition occurs?

A

No

26
Q

What are the flight control laws?

A
  • Normal Law
  • Alternate Law
  • Direct Law
  • Back up control law
  • Abnormal Attitude Law
27
Q

What control are available in mechanical back up law?

A
  • Manual pitch trim
  • Rudder pedals
  • Engine thrust
28
Q

Beyond what bank angle does automatic pitch trim stop?

A

33°

29
Q

What are the normal law protections?

A
  • Maneuver protection
  • Pitch attitude protection
  • High speed protection
  • Alpha protection (angle of attack protection)
30
Q

What is maneuver protection? What are its limits?

A
  • It prevents the aircraft from overstressing
  • +2.5 G and -1.0 G (clean configuration)
  • +1.0 G and -0.0 G (other configuration)
31
Q

What is pitch attitude protection and what are its limits?

A
  • limits excessive aircraft nose up and nose down pitch
  • +30° nose up and -15° nose down
32
Q

How are the pitch limits indicated on the PFD?

A
  • green equal signs at +30° nose up in -15° nose down
33
Q

What happens to the flight directors if the nose pitch limits a reached?

A

It disappears

34
Q

What is high-speed protection and what are its limits?

A
  • it limits aircraft speed
  • green equal sign just above Vmo/Mmo
35
Q

What happens when the high speed protection limit is reached?

A
  • The ELACs pitch up the aircraft to prevent further acceleration.
  • nose down automatic trim is inhibited
  • auto pilot disengages
36
Q

After high-speed protection has been activated, and the sidestick is returned to neutral to what speed does the aircraft return?

A

Vmo/Mmo

37
Q

What is alpha protection?

A

Aircraft flight control surfaces prevent the angle of attack from exceeding its limits.

38
Q

What happens if Alpha PROT is reached?

A
  • Pitch control changes from load demand to alpha demand
  • Auto pilot is disengaged
  • Nose up trim is inhibited
39
Q

What speed is reached is the side stick is held to full back?

A

Alpha MAX

40
Q

What is alpha floor protection?

A
  • auto thrust system
  • Only available in normal law
  • ## commands TOG a thrust when triggered
41
Q

Up to what bank angle will the aircraft maintain the angle even if side stick pressure is released?

A

33°

42
Q

To bank the aircraft beyond 33° what must the pilot do?

A
  • Roll the aircraft to the desired bank angle and hold it there
  • Apply back pressure to maintain altitude
43
Q

If you are at angles greater than 33° and release the side stick side pressure what happens?

A

Positive spiral stability returns the aircraft to 33° bank angle.

44
Q

Between what bank angles does the aircraft maintain positive spiral stability?

A
  • Greater than 33°, but less than 67°
  • at all Bank angles if high speed or alpha protection is active
45
Q

If alpha or high speed protection is active to what bank angle does the aircraft return if the stick pressure is released?

A

0° bank angle

46
Q

What is the bank angle protection limit?

A

67°

47
Q

What is the bank angle limit if high speed or aloha protection is active?

A

45° bank angle

48
Q

What happens at 45° bank angle is exceeded?

A
  • auto pilot disconnect
  • Flight Director disappears
49
Q

An approach at which altitude RA is the pitch trim frozen?
At which altitude do the ELACs add a gentle nose down command?

A
  • 50 feet AGL
  • 30 feet AGL
50
Q

What Foltz in flight control computers will cause the aircraft to switch to alternate law?

A
  • Dual ELAC faults
  • Dual FAC faults
  • Triple SEC faults
  • Dual hydraulic faults (except HYD B+Y SYS LO PR)
  • Dual ADR faults
  • Dual IR faults
51
Q

How can you tell if you’re in ALT LAW?

A
  • ECAM F/CTL ALTN LAW (PROT LOST)
  • Amber Xs at pitch and roll limits
  • Airspeed indicator changes to Red/Black indicator (no Amber alpha Prot and alpha Max indication) (top of red indicates Vsw)
52
Q

Is high-speed protection available in ALT LAW?

A

No, high speed stability is still available.
- A protection prevents you from exceeding a limit.
- Stability only discourages you from exceeding a limit. You can always manually override a stability with sidestick input.

53
Q

Can the aircraft be stalled?

A

Yes, if in ALT LAW and the side stick is held back.

54
Q

Does alternate law provide a landing mode? What happens as a result?

A

No
When landing gear is extended, alternate law changes to direct law

55
Q

How can the pilot tell if the aircraft is in direct law?

A
  • ECAM F/CTL DIRECT LAW (PROT LOST)
  • PFD Indicates USE MAN PITCH TRIM
  • Amber Xs
56
Q

After having recovered from abnormal attitude law, what law does the aircraft return to?

A

ALT LAW

57
Q

How can the pilot tell if they are in backup control law?

A
  • PFD indicates red MAN PITCH TRIM ONLY
  • Red SPD SEL above speed tape
  • Red SPD LIM next to speed tape
  • Amber Xs

Jetstar A320/321 (32 decks)

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