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Allegiant A320 Systems (2024) > Autoflight > Flashcards

Autoflight Flashcards

1
Q

Q1 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

What are the main components of the FMGS?

A
  • 2 FMGCs
  • 2 MCDUs
  • 1 FCU (two independent channels)
  • 2FACs

[FCOM-DSC-22-10-10]

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2
Q

Q2 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

What are the functions of the Flight Management Guidance Computers?

A
  • Flight Guidance
  • Flight Management

[FCOM-DSC-22-10-10]

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3
Q

Q3 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

What are the 3 modes of FMGC operation?

A
  • Independent (MCDU scratchpad displays – INDEPENDENT OPERATION)
  • Single (ND displays – SELECT OFFSIDE RNG/MODE)
  • Dual (Normal)

[FCOM-DSC-22-10-30]

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4
Q

Q4 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

What are the 2 modes of flight guidance?

A

Managed Guidance
Selected Guidance

[FCOM-DSC-22-30-10]

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5
Q

Q5 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

What is the Managed mode of flight guidance used for?

A

Long-term lateral, vertical, and speed profiles as determined by the FMGS

[FCOM-DSC-22-30-10]

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6
Q

Q6 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

What is the Selected mode of flight guidance used for?

A

Temporary lateral, vertical, and speed commands as selected with the FCU

[FCOM-DSC-22-30-10]

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7
Q

Q7 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

Does Selected or Managed Guidance have priority?

A

Selected Guidance always has priority

[FCOM-DSC-22-10-10]

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8
Q

Q8 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

How do you determine the validity of the navigation database?

A

On the Aircraft Status page via the MCDU

[FCOM-DSC-22-20-20-50]

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9
Q

Q9 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

What input does each FMGC use for position determination?

A

A hybrid (“mix”) IRS/GPS position

[FCOM-DSC-22-20-20-10]

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10
Q

Q10 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

How does autopilot selection influence master FMGS logic?

A
  • If one autopilot is engaged, the respective FMGS is master
  • If both autopilots are engaged, FMGS 1 will be the master

[FCOM-DSC-22-10-30]

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11
Q

Q11 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

If an amber SELECT OFFSIDE RNG/MODE message is displayed on the ND what action should the crew take?

A

An FMGS has failed and both NDs must be set to the same mode and range (single mode)

[FCOM-DSC-22-10-30]

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12
Q

Q12 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

Can both autopilots be engaged during any phase of flight?

A

No, only during an ILS approach

[FCOM-DSC-22-30-30]

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13
Q

Q13 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

What is the difference between the large and small fonts utilized in the MCDU?

A

Large – Pilot entries and modifiable data
Small – Default/computed non-modifiable data

[FCOM-DSC-22-10-40-10]

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14
Q

Q14 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

Where do you enter the Zero Fuel Weight?

A

INIT B page (not accessible after engine start)

[FCOM-DSC-22-20-50-10-25]

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15
Q

Q15 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

What do amber box prompts on the MCDU indicate?

A

An entry is mandatory

[FCOM-DSC-22-10-40-10]

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16
Q

Q16 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

What occurs when managed NAV mode is engaged and the aircraft flies into a flight plan discontinuity?

A

NAV mode will be lost and the HDG/TRK mode engage

[FCOM-DSC-22-20-30-10-05]

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17
Q

Q17 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

What is the function of the Flight Control Unit?

A
  • Permits short term interface between the pilot and FMGS
  • Allows temporary modification of any flight parameter (HDG, SPD, ALT, V/S)
  • Used to select operational modes of the autopilots, flight directors, and A/THR system

[ FCOM-DSC-22-10-10 ]

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18
Q

Q18 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

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

A

FMGS Managed Guidance is in use

[FCOM-DSC-22-10-40-20]

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19
Q

Q19 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

How is Selected Guidance engaged?

A

Pull the appropriate selector knob

[FCOM-DSC-22-10-40-20]

20
Q

Q20 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

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

A

Confirm all mode inputs by reference to the Flight Mode Annunciator (FMA)

[FCOM-DSC-22-30-100]

21
Q

Q21 | MCDU / FLIGHT MANAGEMENT GUIDANCE SYSTEM

Will the FCU Altitude window ever display dashes?

A
  • No.
  • Pilot selected altitude will always be displayed

[FCOM-DSC-22-10-40-20]

22
Q

Q22 | PRIMARY FLIGHT DISPLAY

What does each column mean on the PFD?

A

A/THR | VERTICAL | LATERAL | APPROACH CAPABILITY, DH/MDA | AP, FD, A/THR ENGAGEMENT STATUS

[FCOM-DSC-22-30-100]

23
Q

Q23 | PRIMARY FLIGHT DISPLAY

How is the crew made aware of mode changes on the FMA?

A

A white box is temporarily displayed around the new indication (10-15secs)

[FCOM-DSC-22-30-100]

24
Q

Q24 | PRIMARY FLIGHT DISPLAY

How are armed modes displayed on the FMA?

A
  • Blue – armed
  • Magenta – armed because of a constraint
  • Green – engaged

[FCOM-DSC-22-30-100]

25
Q

Q25 | PRIMARY FLIGHT DISPLAY

When is the side stick position indication icon (white cross) displayed?

A
  • Displayed when the first engine is started
  • Disappears at liftoff

[FCOM-DSC-20-30]

26
Q

Q26 | PRIMARY FLIGHT DISPLAY

What would the large red arrowheads indicate?

A

Pitch attitude of > 30°

[FCOM-DSC-31-40]

27
Q

Q27 | PRIMARY FLIGHT DISPLAY

What is the meaning of USE MANUAL PITCH TRIM?

A

You are in Direct Law

[FCOM-DSC-27-20-20]

28
Q

Q28 | PRIMARY FLIGHT DISPLAY

What is the meaning of MAN PITCH TRIM ONLY?

A

You are in Mechanical Backup

[FCOM-DSC-27-20-20]

29
Q

Q29 | PRIMARY FLIGHT DISPLAY

What are the pitch and roll angle limits indicated by the green ‘=’ signs?

A
  • Pitch: +30° up/-15° down
  • Roll: +/- 67°

[FCOM-DSC-31-40, FCOM-DSC-27-20-10-30]

30
Q

Q30 | PRIMARY FLIGHT DISPLAY

How can you determine you are in Alternate Law?

A
  • Amber X’s replace the green = marks at the pitch and bank limits
  • Only VLS and VSW is displayed on the airspeed scale

[FCOM-DSC-27-20-20]

31
Q

Q31 | PRIMARY FLIGHT DISPLAY

When would the sideslip index change from yellow to blue?

A

In case of an engine failure during takeoff/go-around, it is now a blue beta target

[FCOM-DSC-31-40]

32
Q

Q32 | PRIMARY FLIGHT DISPLAY

What does the yellow speed trend line on the airspeed display indicate?

A

The speed the aircraft will reach in 10 seconds if acceleration/deceleration remains constant

[FCOM-DSC-31-40]

33
Q

Q33 | PRIMARY FLIGHT DISPLAY

What is the difference between the magenta and blue target airspeeds?

A
  • Magenta – Managed speed computed by the FMGC
  • Blue – Selected speed on the FCU

[ FCOM-DSC-31-40 ]

34
Q

Q34 | PRIMARY FLIGHT DISPLAY

What speed does VMAX represent and how is it displayed?

A
  • It is the lowest of Vmo/Mmo, VLE, or VFE
  • Defined by the bottom of a red and black strip along the speed scale

[ FCOM-DSC-31-40, FCOM-PRO-SUP-10 ]

35
Q

Q35 | PRIMARY FLIGHT DISPLAY

What is VLS?

A
  • Represents lowest selectable speed providing an appropriate margin to the stall speed
  • Corresponds to 1.13 VS during takeoff
  • Corresponds to 1.23 VS after retraction of one step of flaps
  • Corresponds to 1.28 VS in clean configuration
  • Above 20,000ft, VLS is corrected for Mach effect to maintain a buffet margin of 0.2 G
  • Equivalent to VREF in approach mode
  • Increases with speedbrake extension

[ FCOM-DSC-31-40, FCOM-DSC-22-10-50-20, FCOM-PRO-SUP-10 ]

36
Q

Q36 | PRIMARY FLIGHT DISPLAY

What is Green Dot speed?

A
  • Engine out operating speed in clean configuration
  • Appears when the aircraft is in the clean configuration
  • Corresponds to the best lift-to-drag ratio

[ FCOM-DSC-31-40, FCOM-PRO-SUP-10 ]

37
Q

Q37 | PRIMARY FLIGHT DISPLAY

What is Ground Speed Mini?

A
  • Based on a calculated groundspeed at the runway
  • Protects against actual groundspeed dropping below this calculated groundspeed

[ FCOM-DSC-22_30-60-20 ]

38
Q

Q38 | PRIMARY FLIGHT DISPLAY

What does it mean when you see the magenta triangle on the PFD speed tape above the FMGC computed or entered VAPP during an approach?

A

Ground Speed Mini has increased speed due to a higher headwind component at your present location than what was calculated at the runway

[ FCOM-DSC-22_30-60-20 ]

39
Q

Q39 | PRIMARY FLIGHT DISPLAY

Is the ground speed mini function available in selected speed?

A

No – Managed speed only

[ FCOM-DSC-22-30-90 ]

40
Q

Q40 | PRIMARY FLIGHT DISPLAY

What are 3 ways to disconnect the A/THR?

A
  • Instinctive Disconnect buttons
  • Thrust Levers to IDLE
  • A/THR pushbutton

[ FCOM-DSC-22-30-90 ]

41
Q

Q41 | PRIMARY FLIGHT DISPLAY

How do you disconnect the A/THR for the remainder of the flight?

A

Press and hold the Instinctive Disconnect Pushbutton for 15 seconds

[ FCOM-DSC-22-30-90 ]

42
Q

Q42 | PRIMARY FLIGHT DISPLAY

What would you lose if you held down the Instinctive Disconnect Pushbutton for more that 15 seconds?

A

Alpha Floor Protection

[ FCOM-DSC-22-30-90 ]

43
Q

Q43 | PRIMARY FLIGHT DISPLAY

What happens to thrust and what annunciates on the FMA when you reach Alpha Floor?

A
  • Thrust – TOGA
  • FMA – A.FLOOR

[ FCOM-DSC-22-30-90 ]

44
Q

Q44 | PRIMARY FLIGHT DISPLAY

What occurs during Alpha Floor protection after the A. FLOOR conditions are no longer applicable?

A

FMA changes to TOGA LK

NOTE:
On some software standards the mode reverts to the mode that was active prior to the engagement of A. FLOOR

[ FCOM-DSC- 22_30-50-50 ]

45
Q

Q45 | PRIMARY FLIGHT DISPLAY

How do you regain normal A/THR when in TOGA LK?

A
  • Move Thrust Levers to the TOGA detent
  • Press the Instinctive Disconnect button
  • Return Thrust Levers to CL detent
  • Push the A/THR pushbutton to engage A/THR

[ FCOM-DSC-22-30-90 ]

46
Q

Q46 | PRIMARY FLIGHT DISPLAY

When is Alpha Floor Protection active?

A

From lift-off through 100 feet RA on approach

[ FCOM-DSC-22-30-90 ]

47
Q

Q47 | PRIMARY FLIGHT DISPLAY

When would Thrust Lock occur?

A
  • Thrust levers in CL detent and A/THR pushbutton on the FCU is pushed, or
  • A/THR disconnects due to a failure

[ FCOM-DSC-22-30-90 ]

Allegiant A320 Systems (2024) (18 decks)

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