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Allegiant Airbus 320 > Flight Controls/FCU > Flashcards

Flight Controls/FCU Flashcards

1
Q

What does ELAC stand for?

A

Elevator Aileron Computer

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2
Q

How many ELAC’s on the Airbus?

A

2

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3
Q

What are the functions of the ELAC?

A
  • Control the elevators, ailerons and trimmable horizontal stabilizer (THS)
  • The ELACs compute the need for roll spoiler movement (which is sent to the SECs), and rudder yaw movement (which is sent to the FACs)
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4
Q

In the event a single ELAC should fail, what would happen?

A

The remaining ELAC is capable of providing complete control of the ailerons, elevators, and THS

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5
Q

What does SEC stand for?

A

Spoiler Elevator Computer

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6
Q

How many SECs installed?

A

3

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7
Q

What is the primary responsibility of the SECs?

A

Spoiler control- each SEC controls one or two pairs of spoilers

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8
Q

What does a FAULT light in a SEC pb mean?

A

The SEC is inoperative

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9
Q

What is lost with an inoperative SEC?

A

The spoiler panels associated with the failed SEC are inoperative

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10
Q

Both ELACs fail, can any of the SECs provide backup and of what functions?

A
  • SECs 1 and 2 can provide backup pitch control of the elevators and THS
  • Aileron control is lost and ailerons streamline
  • Roll is accomplished with just the spoilers
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11
Q

What does FAC stand for?

A

Flight Augmentation Computer

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12
Q

How many FACs are installed?

A

2

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13
Q

What are the functions of the FACs?

A
  • Rudder
  • Auto turn coordination
  • Yaw dampening
  • Rudder limiting
  • Rudder trim
  • Characteristic Speeds
  • Flight envelope and maneuvering computations
  • Alpha floor protection
  • Windshear detection
  • Low energy warning computation (“SPEED, SPEED, SPEED”)
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14
Q

What happens if you select a FAC pb to OFF?

A
  • Deactivates the cooresponding yaw dampening and rudder trim functions to that FAC
  • If the FAC is still operable, it continues to compute all flight envelope functions and maneuvering speeds
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15
Q

What system prevents flap and slat asymmetry?

A

Wing Tip Brakes (WTB)

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16
Q

How many Slat/Flap Control Computers (SFCC) are installed?

A

2

17
Q

What would occur if one SFCC failed?

A

The slats and flaps would continue to operate, but at half speed

18
Q

What slat/flap configurations correspond to position 1 on the FLAPS lever and how do they differ?

A
  • CONF 1+F is used for takeoff and provides both slats + flaps
  • CONF 1 is used inflight and is slats only
19
Q

When will the Automatic Retraction System operate?

A

During acceleration in CONF 1+F the flaps (not slats) will automatically retract to 0 at 210 knots

20
Q

What is Alpha Lock?

A

This function inhibits retracting slats (not flaps) from 1 to 0 at high angle of attack or low airspeed

21
Q

What happens to the ailerons when the flaps are extended?

A

The ailerons droop 5°

22
Q

Is there any landing configuration when speed brake extension is inhibited?

A

Flaps full

23
Q

In flight, what happens if a spoiler FAULT is detected or electrical power is lost?

A

The spoiler automatically retracts

24
Q

When hand flying the aircraft can we trim the rudder?

A

Yes, by using the RUDDER TRIM rotary switch

25
Q

What happens if you turn the RUDDER TRIM with the autopilot engaged?

A

Nothing

26
Q

What is the RUD TRIM Reset button used for?

A

To reset the rudder trim to 0°

27
Q

Is there any feedback in the rudder pedals from the yaw dampening or turn coordination?

A

No

28
Q

What does the red arrow in the SIDE STICK PRIORITY light mean?

A

It illuminates in front of the pilot losing authority

29
Q

How would you regain control with the red arrow in the SIDE STICK PRIORITY light illuminated?

A
  • The last pilot to press the pb on the sidestick will have authority
  • An aural “Priority Left/Right” will sound
30
Q

What does the flashing green CAPT and FO SIDE STICK PRIORITY lights indicate?

A

Both side sticks have been moved simultaneously and neither pilot has taken priority

31
Q

What happens when both pilots make an input simultaneously on the side stick?

A
  • The inputs are algebraically summed - up to the normal limits
  • An aural “Dual Input” will sound
  • Green CAPT and FO lights will illuminate
32
Q

What is the function of the LOC pb?

A

Arms, engages, or disengages the LOC mode

33
Q

What do dashes in the FCU display windows along with the adjacent white dot indicate?

A

FMGS Managed Guidance is in use

34
Q

How is Selected Guidance engaged?

A

Pull the appropriate selector knob

35
Q

How do you confirm all autopilot, FD, and A/THR inputs?

A

Confirm all mode inputs by reference to the FMA

36
Q

What is denoted by the blue triangle on the PFD? Magenta dagger? Green diamond? Yellow line?

A
  • Blue triangle: selected heading/track
  • Magenta dagger: localizer selection
  • Green diamond: aircraft track
  • Yellow line: aircraft’s actual heading

Allegiant Airbus 320 (18 decks)

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