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CRJ 200 Aircraft Systems > Automatic Flight Controls > Flashcards

Automatic Flight Controls Flashcards

1
Q

What two systems are integrated by the Automatic Flight Control System (AFCS)?

A

Flight Director and the Autopilot Systems.

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2
Q

What is AFCS?

A

Automatic Flight Control System

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3
Q

What four systems does the AFCS supply information to?

A

Dual flight directors
Two-axis autopilot
Automatic pitch trim
Two yaw dampers

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4
Q

What is the yellow?

A

Flight Director

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5
Q

Difference between flight director and auto pilot?

A

autopilot: controls the aircraft

flight director does the calculations to determine the desired flight path and can usually display this information to the pilot.

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6
Q

Can you hand fly the airplane with flight director activated?

A

Yes

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7
Q

In general, where do the flight director receive the information?

A 
the air data computer (ADC), 
Attitude Heading Reference System (AHRS), 
navigation sources, 
the pilot's control panel
he autopilot servo feedback
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8
Q

What is two-axis autopilot?

A

A two-axis autopilot controls an aircraft in the pitch axis as well as roll.

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9
Q

What are the main AFCS microprocessors and where are they

located?

A

Flight Control Computers (FCC) 1 and 2. They are located in the IAPS

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10
Q

What is integrated avionics processing system?

A

The Integrated Avionics Processing System.

This system contains many computers and components and provides the means for them to communicate.

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11
Q

What is IAPS? Where is it located?

A

located in the avionics compartment.

Integrated avionics processing system

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12
Q

What are the main computers form AFCS?

Where are they located?

A

Two flight control computers (FCCs),

mounted inside the IAPS

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13
Q

FCC stands for

A

Flight Control computer

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14
Q

Where does the FCC receive the information?

A

mode selections from the flight control panel

sensor information from the air data system,

navigation systems,

inertial reference system,

radio altimeter

surface position sensors.

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15
Q

After FCC receiving information, What does it do?

A

guidance commands to the autopilot

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16
Q

Explain the following

A
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17
Q

What does FCC contain?

A

Control logic for the dual flight directors, the two axes autopilot with automatic pitch trim and the dual yaw dampers

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18
Q

What does FCC do for AFCS?

A

The FCCs use the inertial reference system (IRS) and air data computer (ADC) system information to calculate flight path and control parameters for the AFCS.

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19
Q

Explain the following

A
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20
Q

What functions can you select on the flight control panel?

A

Remove flight director cues from the primary flight display and revert to basic pitch and roll displays

Set course and fly to the active navigation source

Engage, disengage and transfer control of the autopilot

Reduce autopilot gains

Set and maintain airspeed, vertical speed, and altitude

Set navigation, heading selection and approach modes

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21
Q

How does the flight director function?

A

integrated with the AFCS modes, selected on the flight control panel, for autopilot operation.

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22
Q

Can u select AFCS modes with engaging autopilot?

A

Yes

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23
Q

The flight director system provides commands to perform the following:

A

Hold a desired attitude
Maintain a pressure altitude
Hold a vertical speed
Hold a Mach number or indicated airspeed
Capture and maintain a preselected barometric-corrected altitude
Capture and track a preselected heading
Capture and track a selected navigation source (VOR, LOC, G/S or FMS)
Capture and track a localizer and glideslope
Maintain a wings-level, fixed pitch-up attitude for takeoff or go-around
Provide windshear escape guidance

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24
Q

Explain the following

A
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25
Q

How,do the flight directors are engaged?

A

Flight directors are simultaneously turned on by either selecting a vertical mode, selecting a lateral mode, or by engaging the autopilot.

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26
Q

What does flight director activates?

A

Flight director selection activates all flight control mode annunciations and presents steering commands for the selected mode(s).

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27
Q

What happens when both FD are on and autopilot is engaged?

A

When both flight directors are turned on, by engaging the autopilot, basic modes (pitch and roll) are automatically selected.

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28
Q

What does the transfer mode do?

A

Transfer mode controls the routing of flight guidance commands to the autopilot and flight directors.

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29
Q

What happens when the transfer mode is selected?

A

When transfer mode is selected, the copilot’s flight guidance command drives both flight directors.

When not transferred, the pilot’s flight guidance command drives both flight directors.

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30
Q

Explain the following

A
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31
Q

Explaain the following

A
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32
Q

Explain the CRS 1 and 2 on the flight control panel.

A
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33
Q

Explain the course Pointer, to/fro, indicator and selected course readout on PFD

A
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34
Q

Explain the cross side course pointer on the multifunction display

A
35
Q

What is the purpose of Flight director synchronization?

A

is used to set the vertical and/or lateral reference to the current flight value.

36
Q

Can u select Selecting synchronization when the autopilot is engaged?

A

Yes

37
Q

How does the Synchronization is annunciated?

A

a yellow SYNC on the primary flight display. The message will remain for 3 seconds, or until the sync switch is released, whichever is longer.

38
Q

Explain the following

A
39
Q

Are both FDs always active?

A

During most modes, one flight director is supplying guidance information to both PFDs.

The other FD is in standby but they do continue to continuously cross talk.

40
Q

In what conditions both FDs are active

A
  • Takeoff mode
  • Approach mode
  • Go around mode
41
Q

What occurs if the active FD fails?

A

A white FDl or FD 2 FAIL EICAS status message will be displayed.

Also a red FD in a box will appear on the PFDs.

42
Q

What is EICAS?

A

Engine Indicating and Crew Alerting System

displaying engine parameters and alerting crew to system configuration or faults.

43
Q

Where are the vertical and lateral mode selections of the FD displayed?

A

On the Flight Mode Annunciator (FMA) located at the top of the PFDs.

44
Q

What is FMA

A

The Flight Mode Annunciator (FMA) at the top of the PFD, shows the status of the A/THR, the AP/FD vertical and lateral modes, the approach capabilities, and the AP/FD-A/THR engagement status. .

45
Q

Explain the two fields of the FMA?

A

A vertical cyan line separates the two fields,

left side the active field and the right side the armed field.

The top line of the FMA displays the active and armed FD lateral mode and the bottom line the active and armed FD vertical mode.

The active side is green text and the armed side is white text.

46
Q

What information do the FCCs process to figure the flight of the aircraft?

A

The information needed comes from the attitude and heading reference system (AHRS) and the air data compl_lter (ADC).

47
Q

What is attitude and heading reference system?

A

contains an IMU (3 gyroscopes, 3 accelerometers, and 3 magnetometers)

This allows to calculate highly reliable attitude and heading relative to magnetic north, in addition to roll, pitch, and yaw.

48
Q

What happens if information in the FMA field is invalid?

A

If any information is invalid, it is indicated by a red line where the text would be.

49
Q

When can only one FD command bar be removed from the PFDs and when will both FD command bars be removed by a selection of the FD button on the FCP?

Selection of the FD FCP button on the side that is not active will remove the FD command bars from that side only. Selection of the FD FCP button on the side that is active will remove both FD command bars.

A
50
Q

If the autopilot (AP) is engaged, will deselecting the FD button on the active side disengage the AP?

No, the onside FD button is inactive and des
electing it will not disengage the AP. If the off-side FD button is pressed, the FD bars on the off-side Will be removed and will not disengage the AP.

A

No

51
Q

What is the purpose of the XFR button on the FCP?

A

The XFR button switches how the computers are used.

For most of the flight, only one computer is use and provides output to both left and right cockpit displays.

Pilots will get warnings if this computer fails, and they can push the XFR button to switch to the other one.

52
Q

What FD modes are both FDs active and display information received from the onside FCC?

A 
Takeoff mode (TOTO) • 
Approach mode (APPR) • 
Go around mode (GAGA)

FCC 1 controls FDl only and FCC2 controls FD2.

53
Q

What do the FCC status indicator lights on the flight control panel (FCP) indicate?

A

When a mode button is selected the request is sent to the FCCs and if the FCCs determine that all conditions are met for that function, the green lights will illuminate.

The light to the left of the respective button indicates FCC 1 has acknowledged the request and ·the light to the right that FCC 2 has acknowledged the request.

54
Q

What does the flight director synchronization switch (FD SYNC) do when the AP is engaged?

A

Nothing

55
Q

What is ·the purpose of the FD SYNC switch?

A

When the AP is not engaged, it synchronizes vertical and lateral values at the time of selection.

56
Q

What happens when the FD SYNC button is pressed and released while the -FD has an active vertical mode?

A

There is a yellow SYNC message in the armed field of the FMA and it will stay there for 3 seconds.

The FD is synchronized to the current aircraft vertical mode selected and the FD will maintain this pitch even if the actual aircraft pitch is changed.

E?(: If IAS is selected and the FD SYNC is pressed, the FD will match the current pitch to maintain the current IAS.

57
Q

How do you disable the active. lateral-mode of the FD?

A

Re-select the active FCP button or select another lateral mode.

58
Q

What is toga?

A

To/ga stands for takeoff/go-around. It’s a button that basically tells the auto throttle to set power for either of those modes, depending on if you’re taking off or landing

59
Q

What heading will the FD maintained when the TOGA switch is pressed on a go-around?

A

The FD will hold the beading-at the time of activation.

60
Q

What is the default lateral mode of the FD?

A

Roll mode

61
Q

If there is not a lateral mode selected at the time the AP is engaged,
what lateral mode will the AP maintain?

A

If the bank angle is less than 5 degrees, the FD will roll level.

If the bank angle is greater than 5 degrees, the FD maintains the bank angle at the time of AP engagement.

62
Q

How can the AP disconnect warning be canceled after the TOGA switch is pressed on ago-around?

A

Push the TOGA switch again or push the AP disconnect switch on the control wheel.

63
Q

What occurs to the FD lateral mode if the navigation source is lost?

A

Reverts to roll mode.

64
Q

How are lateral FD modes selected?

A

The lateral FD modes are activated or armed by buttons on the FCP or the TOGA switches on the thrust levers.

65
Q

When the localizer captures, what FCP modes will automatically clear if engaged?

A

It clears the heading mode, half bank, and the turbulence mode.

66
Q

What course must be set when using the back course mode?

A

The front course must be set.

67
Q

How is the go-around mode indicated on the FMA?

A

The lateral and vertical mode on the active FMA has the green text GA

68
Q

Explain the half bank option of the FD?

A

This button will restrict the FD bank to 15 degrees.

It is automatically selected climbing through 31,600 feet and automatically turned off descending through 31,600 feet.

It is not available during a go-around mode, takeoff mode, on-side localizer or approach capture.

69
Q

How is an active vertical mode disabled?

A

Select another vertical mode, or re-select the active FCP button.

70
Q

What are the ways to arm or activate a vertical mode?

A
  • The vertical mode buttons like VS on the FCP or the pitch wheel on the FCP. If just the pitch wheel is rotated after a new altitude is selected, pitch mode will be activated.
  • TOGA switches.
71
Q

How is a pre-selected altitude armed when set in the altitude alerter?

A

When a vertical mode is selected like VS or IAS.

72
Q

How is the altitude capturing point of the FD determined?

A

It is determined by the closure rate.

With high vertical speeds the capture point is further from the altitude.

If the vertical speed of the aircraft is only 500 £pm, then altitude capturing occurs within about 50 feet of the selected altitude.

When the vertical speed is 3,000 £pm, then altitude capture can occur even before the 1,000.
feet to level off occurs.

73
Q

Explain the altitude capture process in the FMA?

A

With a new altitude selected there is a white ALTS in the vertical armed portion of the FMA.

When the ALTS mode is captured, the white ALTS disappears and a green ALTS CAP appears in the active vertical portion of the FMA and will flash for 5 seconds and then become steady.

74
Q

How is an active vertical mode disabled?

A

Select another vertical mode, or re-select the active FCP button.

75
Q

TAKEOFF MODE

Roll and Pitch

A

ROLL: WINGS LEVEL- HDG HOLD
PITCH: 15 DEGREES NOSE UP

76
Q

Clim Modes

A
77
Q

Cruise Modes

A
78
Q

Descent Mode

A
79
Q

Gp Around Modes

A
80
Q

Approach Modes

A
81
Q

What is the following Panel for?

A

Autopilot Panel

Contains switches to couple, uncouple, transfer control and reduce gains on the autopilot.

82
Q

What is the following panel include?

A

Flight Director and Course Selector Panels Contains switches to select basic pitch and roll modes (when not coupled) and set course on primary flight display.

83
Q

What is the following panel for?

A
84
Q

What is the following panel for?

A

CRJ 200 Aircraft Systems (6 decks)

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