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British Airways > Autoflight Systems > Flashcards

Autoflight Systems Flashcards

1
Q

What are the pilots inputs to the FMGS?

A

MCDU and FCU

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2
Q

What are the FMGS outputs?

A

FD/AP ATHR MCDU and EFIS

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3
Q

What is the FMGS

A

Flight Management Guidance system, consists of two FMGCs
Two MCDUs
Two FACs
One FCU

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4
Q

How many FMGCs

A

2

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5
Q

Normally MCDU 1 talks to which FMCG?

A

FMGC 1 although the will cross talk.

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6
Q

Which FMCG does the FCU send signals to?

A

Both FMGCs

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7
Q

What determines which FMGC is the master?

A

Whichever AP is on.

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8
Q

When does the speed window change from SPD to MACH?

A

FL300 roughly.

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9
Q

Can you have a manged vertical profile without a managed lateral profile?

A

No, need lateral.

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10
Q

What does the Exped button give you?

A

Best Rate-of-climb speed.

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11
Q

Can you select AP or ATHR off on the FCU?

A

Yes but not the recommended procedure.

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12
Q

Where should short term actions be made to the flight?

A

Through the FCU

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13
Q

How many FMA Columns are there?

A
  1. Thrust, Vertical, Lateral, Approach capability and DH, AP FD ATHR.
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14
Q

What are the FMA Common Modes?

A

When Lateral and Vertical FMAs display just one mode.

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15
Q

What can appear on the third line row of the FMAs?

A

Reminders and info.

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16
Q

When can the AP be engaged after take-off?

A

100ft or 5 sec

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17
Q

How else can you de-select the AP?

A

With FCU, Side Stick or Rudders. Will get a continuous warning.

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18
Q

Where does each FD get info?

A

From its onside FG unit.

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19
Q

If you turn FD back on in flight what modes do you get?

A

Basic Modes HDG VS TRK FPA.

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20
Q

If you display the Bird with FD selected what do you see?

A

The Flight Path Director FPD.

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21
Q

if you have the Bird/FPD and Go Around what happens?

A

FDs are displayed as normal.

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22
Q

What are the 2 modes the ATHR can operate?

A

Adaptable Thrust or Speed Mode and Thrust Mode (THR CLB)

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23
Q

What are the 3 ATHR states?

A

Disconnected/off
Armed
Active/on.

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24
Q

What is the ATHR state during taxi? FMA?

A

Disconnected, no.

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25
Q

What is the ATHR state once take-off initiated?

A

Armed. ATHR Blue and A/THR on FCU illuminated.

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26
Q

What happens to the vertical mode when moved from FLX to CL?

A

CLB mode is active.

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27
Q

What mode is the ATHR in when THR CLB?

A

Thrust Mode. A fixed thrust setting.

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28
Q

What happens when you move the Thrust Levers above the CL detent again?

A

Will get MAN THR white and ATHR will go back into armed mode.

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29
Q

What is the ATHR mode when ALT VS GS or generally during approach.

A

ATHR in Speed Mode

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30
Q

What happens if you don’t retard in the Flare?

A

ATHR will maintain speed.

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31
Q

How do you disengage ATHR and Alpha Floor for the rest of the flight?

A

Push the ATHR disconnect buttons for 15 sec.

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32
Q

What are the three sources of position for the FMGC?

A

Mix IRS, Radio aids, GPS. Uses a selection based on altitude

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33
Q

Which IRS to each FMGC use?

A

Onside IRS or IRS3.

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34
Q

What is the GPIRS position?

A

A mix of GPS and IRS, calculated by each IRS and FMGC selects one it thinks best.

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35
Q

What is the difference between the Mix IRS and the GPIRS position called?

A

The Bias

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36
Q

When is the FM position updated on take-off?

A

At the end of the runway.

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37
Q

What is the EPE?

A

Estimated position error. Compared to the RNP.

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38
Q

What will you get when EPE>RNP?

A

NAV ACCUR DOWNGRAD

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39
Q

What must you do if GPS PRIMARY LOST or NAV ACCUR DOWNGRAD

A

Systematically check position using raw data.

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40
Q

What happens if you activate second nav database in flight?

A

All current data will be lost.

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41
Q

What will a positive idle factor do to your T/D point?

A

A positive factor will give an earlier one and vice versa.

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42
Q

What colour is the TO waypoint on the F-PLN page?

A

White.

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43
Q

What will happen if you delete a waypoint in the F-PLN page?

A

Will get a F-PLN Discontinuity.

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44
Q

How are Hold speeds calculated?

A

Lowest of Endurance, ICAO Holding, Speed constraint.

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45
Q

What are the F-PLN phases in the FMGC?

A 
Pre-flight
Take-off
Climb
Cruise
descent
Go-Around
Done
Characterised by the speed flown.
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46
Q

What are the CI limits? And speeds?

A

0-999
Anything above 100 is fast
0 is green dot
999 is Vmo-10

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47
Q

How is Vertical Deviation displayed?

A

Green YoYo in Descent and Green Brick on approach (1 dot = 100ft deviation)

48
Q

When off track and NAV is armed when will it engage?

A

When within 1nm of track.

49
Q

If FM Navigation accuracy check is negative what must you have on the ND?

A

Raw Data

50
Q

What happens to the Flight Plan track when HDG is selected and flown off track?

A

Changes to dashed green line.

51
Q

If Vertical mode controls speed what does ATHR command?

A

Thrust

52
Q

If Vertical mode is a path what does the ATHR coommand?

A

Speed.

53
Q

When will ALT be magenta?

A

When armed for a constraint.

54
Q

How is the DES mode planned?

A

Idle to first constraint and then geometric to reach 1000ft at Vapp.

55
Q

If in DES and above the path what will happen?

A

Pitch down to recover, assumes 1/2 speed brake.

56
Q

If DES mode and below path what will happen?

A

Pitch up to recover, respect speed targets, may add thrust.

57
Q

If HDG mode selected whilst in DES what happens?

A

Reverts to VS or FPA and disregards any constraints.

58
Q

What do you need for SRS to engage?

A

V2 in the PERF page and Slats extended

59
Q

What does SRS command?

A

V2+10 min and V2 in EFATO, also controls pitch.

60
Q

When will NAV engage?

A

30ft as long as RWY and SID inserted.

61
Q

When can LOC GS be armed?

A

When ILS/RA not faulty
Above 400ft
Both ILSs tuned identically

62
Q

What will happen if ILS ground transmitter fails on approach?

A

LOC and GS will stay on FMA and FD will flash.

63
Q

What will happen if both ILS receivers onboard fail?

A

Reverts to HDG VS and get red flags. Go Around.

64
Q

When will you see LAND on FMA, and what does it mean?

A

LOC and GS engaged and <300ft. Cannot use FCU.

65
Q

When will Flare mode engage?

A

40ft RA, the 30ft will guide on runway centreline and pitch for flare, at 10ft retard message, thrust is reduced automatically.

66
Q

When will you get Auto Land red warning?

A

Below 200ft
Both APs trip off
Excess dev or loss of LOC>15ft GS>100ft
Difference between Rad Alts

67
Q

On a Non-ILS what will you get when arm APPR mode?

A

FINAL APP NAV, will change to FINALAPP when established fully.

68
Q

When will AP disengage on Non-ILS?

A

MDA-50ft or 400ft if no MDA.

69
Q

If preselected HDG on departure, how long does it stay for after take-off?

A

45 sec

70
Q

How do you put in a Step Climb?

A

Vertical revisión page

71
Q

What is soft Alt hold?

A

Alt CRz

Maintains within 50ft

72
Q

What speed in Expedited climb/descent?

A

Green dot or Vmo-10

73
Q

Nav Accuracy check? What would you do if no GPS Primary?

A

Set up a waypoint in the Prog page, check the difference between this fms derived distance and the raw data from nav aids. Should be within 3nm

74
Q

When is Go Around Armed?

A

Flaps out until 30sec after touchdown.

75
Q

When is Alpha Floor available?

A

Lift-off to 100RA

76
Q

What will you get with Alpha Floor?

A

A.Floor FMA
TOGA thrust
A/THR white if off previously.

77
Q

When won’t you get Alpha Floor

A

Pressing a AT disconnect for more than 15 sec
OEI when Slats out
Alt or Dct law.

78
Q

When is the Windshear warning available?

A

3 sec after lift off to 1300ft RA

1300ft RA to 50ft with at least config 1

79
Q

What will the SRS mode do during windshear on take-off GA?

A

Provide at least a small r.o.c

80
Q

What will happen to AP with high AoA?

A

Will disengage

81
Q

If CLB nd you set an altitude below you what vertical mode will you get?

A

VS and sync

82
Q

If climbing in NAV and select HDG what vertical mode?

A

Open climb

83
Q

If DES and NAV then HDG what vertical mode will you get?

A

VS

84
Q

If you don’t follow FDs when will you get reversion?

A 
VLS-3 
VLS -2 to -19 with speed brake
Vmax + 4
Triple click
SPEED on ATHR
85
Q

If both thrust levers to idle in flight what happens to AT?

A

Disconnects.

86
Q

Above what height can you disengage APPR with the button on FCU?

A

400ft

87
Q

If one FMGC fails what impact?

A

Other FMCG does everything.

88
Q

What are the main FMCG databases?

A 
Navigation
Performance
Company policy, fuel etc
Mag variation
Pilot waypoints- 20 waypoint 10 rwy 20 navaids 5 routes
89
Q

What does the FAC do?

A

Computes data for flight envelope and speed, low energy, windshear. Controls rudder, rudder trim and yaw damper.

90
Q

What are the three FMCG modes?

A

Dual
Independent
Single

91
Q

What is the FMGC master logic?

A 
AP1 FMGC1
AP2 FMGC2
FD1 on FMGC1 
only FD2 on FMGC2
No AP/FD then FMGC1
92
Q

What is independent mode?

A

When each FMGC is controlling its own side.

93
Q

What does OPP FMGC IN PROCESS msg mean?

A

You are in single mode and one FMCG has failed.

94
Q

What ND modes will you see Wx Rdr

A

All except PLAN

95
Q

What colour is the alternate fpn on ND?

A

Dashed Blue

96
Q

What colour is secondary flight plan on ND?

A

Dimmed white

97
Q

What colour is the Eng out SID on ND?

A

Solid yellow

98
Q

What is the definition on V2 for A320?

A

1.13 Vs1g

99
Q

What is the definition of V2 for A320?

A

1.23 Vs1g

100
Q

What is VLS?

A

Lowest selectable speed

  1. 13VS on take-off
  2. 23Vs during flap retraction
  3. 28 Vs clean
101
Q

What is the maneuvre margin on VLS in the cruise?

A

0.2G

102
Q

What is Green Dot speed?

A

Best lift drag
Eng out operating speed
Below 20000 2xweight+80
Above 20000 add 1kt/1000ft

103
Q

What is Va PROT

A

AoA protection speed, when protection will kick in, top of black and amber strip in normal law

104
Q

What is Va MAX

A

Max AoA in Normal Law, black strip on the speed scale in normal law

105
Q

What is VSW?

A

Stall warning speed, normal law inop, black and red speed tape.

106
Q

VMAX?

A

Vmo/mmo or VFE/VLE

107
Q

How is Vapp calculated

A

VLS + wind

Min 5kts max 15kts

108
Q

In GA when will NAV mode not engage?

A

Pre-set HDG/TRK, GA TRK will engage until HDG pulled.

109
Q

What speed does SRS command in the GA?

A

Current speed of Vapp if higher, up to maximum Vls+25 AEO or Vls+15 OEI

110
Q

When accelerating in GA mode what speed is commanded?

A

Green Dot or speed constraint if lower.

111
Q

When does SRS engage?

A

When Thrust to TOGA or FLX/MCT, as long as slats out, V2 in MCDU and on ground for 30s or more

112
Q

What speed does SRS command in AEO and OEI

A

V2+10 AEO

V2-V2+15max OEI or current speed

113
Q

What is the SRS pitch guidance?

A

18deg or 22.5 in windshear
Also maintains 120fpm climb
Absolute max V2+15

114
Q

When will RWY TRK engage?

A

At 30ft if HDG preset on take-off

GA TRK on GA

115
Q

When does LAND engage?

A

Below 400ft RA FCU inop

116
Q

When might you see Red AUTOLAND?

A

Below 200ft RA with LAND or FLARE, if something happens which means no auto land.

British Airways (22 decks)

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