DOC AIRBUS | AMM A320FSYSTEM DISPLAY - WHEEL PAGE - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. WHEEL Page
The WHEEL Page is described in the following figure with its 15 parameters as follows:
The WHEEL Page is described in the following figure with its 14 parameters as follows:
The description of the WHEEL Page is given in the figure that follows. It has 16 parameters:
The WHEEL Page is described in the following figure with its 12 parameters as follows:
WHEEL Page: Display of the 16 parameters
SD - WHEEL Page: Display of the 15 Parameters ** ON A/C NOT FOR ALL
SD - WHEEL Page: Display of the 13 Parameters ** ON A/C NOT FOR ALL
Item 1: Left L/G position
Item 2: Left L/G door operation
Item 3: Left UP LOCK message
Item 4: Spoilers position indication
Item 4: Nose L/G doors left and right operation
Item 5: Nose L/G doors left and right operation
Item 5: Nose L/G position
Item 6: Nose L/G operation
Item 6: Right L/G position
Item 7: Right L/G operation
Item 7: Brake temperature
Item 8: Brake temperature
Item 8: Wheel number
Item 9: Wheel number
Item 09: Brake release
Item 10: Tire pressure indication (optional)
Item 10: Spoiler position indication
Item 11: Brake release
Item 11: Auto brake mode
Item 12: AUTO BRAKE Messages
Item 12: Hottest brake indication
Item 13: L/G CTL Message
Item 14: Hydraulic status
Only with:
*** NEW MSG DISPLAY OPTION ACTIVATED ***
Item 15: Hottest brake indication
Item 15: Hottest brake indication
Item 16: N/W STEERING message.
The symbols related to these indications are described hereafter:
The WHEEL Page is described in the following figure with its 15 parameters as follows:
The WHEEL Page is described in the following figure with its 14 parameters as follows:
The description of the WHEEL Page is given in the figure that follows. It has 16 parameters:
The WHEEL Page is described in the following figure with its 12 parameters as follows:
WHEEL Page: Display of the 16 parameters SD - WHEEL Page: Display of the 15 Parameters ** ON A/C NOT FOR ALL SD - WHEEL Page: Display of the 13 Parameters ** ON A/C NOT FOR ALL Item 2: Left L/G door operation
Item 3: Left UP LOCK message
Item 4: Spoilers position indication
Item 4: Nose L/G doors left and right operation
Item 5: Nose L/G doors left and right operation
Item 5: Nose L/G position
Item 6: Nose L/G operation
Item 6: Right L/G position
Item 7: Right L/G operation
Item 7: Brake temperature
Item 8: Brake temperature
Item 8: Wheel number
Item 9: Wheel number
Item 09: Brake release
Item 10: Tire pressure indication (optional)
Item 10: Spoiler position indication
Item 11: Brake release
Item 11: Auto brake mode
Item 12: AUTO BRAKE Messages
Item 12: Hottest brake indication
Item 13: L/G CTL Message
Item 14: Hydraulic status
Only with:
*** NEW MSG DISPLAY OPTION ACTIVATED ***
Item 15: Hottest brake indication
Item 15: Hottest brake indication
Item 16: N/W STEERING message.
The symbols related to these indications are described hereafter:
A. Item 1: Left L/G position
(the same principles apply to the others landing gears)
(the same principles apply to the others landing gears)
NOTE: The left symbol is related to Landing Gear Control and Interface Unit 1 (LGCIU1) and the right symbol to LGCIU2.
(1) Case 1
The landing gear is green (fully colored) when the corresponding gear is downlocked and not uplocked.
The landing gear is green (fully colored) when the corresponding gear is downlocked and not uplocked.
(2) Case 2
The landing gear is red (fully colored) when the corresponding gear is not uplocked and not downlocked.
The landing gear is red (fully colored) when the corresponding gear is not uplocked and not downlocked.
(3) Case 3
The landing gear is not displayed when the corresponding gear is uplocked and not downlocked .
The landing gear is not displayed when the corresponding gear is uplocked and not downlocked .
(4) Case 4
The left symbol changes to amber XX when the signals from LGCIU1 to the Display Management Computer (DMC) are not correct.
The right symbol changes to amber XX when the signals from LGCIU2 to the DMC are not correct.
The left symbol changes to amber XX when the signals from LGCIU1 to the Display Management Computer (DMC) are not correct.
The right symbol changes to amber XX when the signals from LGCIU2 to the DMC are not correct.
B. Item 2: Left L/G door operation
(1) Case 1
Door closed and green
The door is uplocked and the door is not fully open.
Door closed and green
The door is uplocked and the door is not fully open.
(2) Case 2
Door ajar and amber
The door is neither uplocked nor fully open.
Door ajar and amber
The door is neither uplocked nor fully open.
(3) Case 3
Door open and amber
The door is fully open and not locked up.
Door open and amber
The door is fully open and not locked up.
(4) Case 4
Amber XX
The door is replaced by amber XX when the door position is not available from the LGCIU1 (left part), or from the LGCIU2 (right part).
Amber XX
The door is replaced by amber XX when the door position is not available from the LGCIU1 (left part), or from the LGCIU2 (right part).
C. Item 2: Left L/G door operation
(1) Case 1
Door closed and green
The door is uplocked and the door is not fully open.
Door closed and green
The door is uplocked and the door is not fully open.
(2) Case 2
Door ajar and amber
The door is neither uplocked nor fully open.
Door ajar and amber
The door is neither uplocked nor fully open.
(3) Case 3
Door open and amber
The door is fully open and not locked up.
Door open and amber
The door is fully open and not locked up.
(4) Case 4
Amber XX
The door is replaced by amber XX when the door position is not available from neither LGCIU.
Amber XX
The door is replaced by amber XX when the door position is not available from neither LGCIU.
D. Item 3: UP LOCK message
This message is displayed in amber when the gear uplock is engaged with the gear downlocked.
It is not displayed in the other cases or when no valid data are available from either LGCIU.
This message is displayed in amber when the gear uplock is engaged with the gear downlocked.
It is not displayed in the other cases or when no valid data are available from either LGCIU.
E. Item 4: Spoiler status indication
(1) Case 1
The spoiler is represented out and green, when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is extended and available, also from the FCDC bus.
The spoiler is represented out and green, when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is extended and available, also from the FCDC bus.
(2) Case 2
The spoiler is represented in and green, when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is retracted and available, also from the FCDC bus.
The spoiler is represented in and green, when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is retracted and available, also from the FCDC bus.
(3) Case 3
The spoiler is represented out and amber when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is extended and faulty (hydraulic failure or servo loop failure), as transmitted from the FCDC bus.
The spoiler is represented out and amber when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is extended and faulty (hydraulic failure or servo loop failure), as transmitted from the FCDC bus.
(4) Case 4
The spoiler is represented in and amber when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is retracted and faulty, as transmitted from the FCDC bus.
The spoiler is represented in and amber when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is retracted and faulty, as transmitted from the FCDC bus.
(5) Case 5
The spoiler is replaced by amber XX when the spoiler status is transmitted as not valid from the FCDC bus, or the information is not transmitted correctly from the FCDC bus.
The spoiler is replaced by amber XX when the spoiler status is transmitted as not valid from the FCDC bus, or the information is not transmitted correctly from the FCDC bus.
F. Item 5: Operation of the left and right NLG doors
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL (1) Case 1
Doors closed and green
The door are uplocked and not fully open.
Doors closed and green
The door are uplocked and not fully open.
(2) Case 2
Doors ajar and amber
The doors are neither uplocked nor fully open.
Doors ajar and amber
The doors are neither uplocked nor fully open.
(3) Case 3
Doors open and amber
The doors are fully open and not locked up.
Doors open and amber
The doors are fully open and not locked up.
(4) Case 4
Amber XX
The doors are replaced by amber XXXX when the doors positions are not available from neither LGCIU.
Amber XX
The doors are replaced by amber XXXX when the doors positions are not available from neither LGCIU.
G. Item 4: Nose L/G doors left and right operation
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL (1) Case 1
Doors closed and green
The door are uplocked.
Doors closed and green
The door are uplocked.
(2) Case 2
Doors ajar and amber
The doors are neither uplocked nor fully open.
Doors ajar and amber
The doors are neither uplocked nor fully open.
(3) Case 3
Doors open and amber
The doors are fully open.
Doors open and amber
The doors are fully open.
(4) Case 4
Amber XX
The doors are replaced by amber XXXX when the doors positions are not available from neither LGCIU.
Amber XX
The doors are replaced by amber XXXX when the doors positions are not available from neither LGCIU.
H. Item 3: UP LOCK Message
This message just above the gear and door symbol is displayed in amber when the gear up lock is engaged, whereas the gear is down locked (information from the LGCIU 1 and 2).
It is not displayed in all other cases.
This message just above the gear and door symbol is displayed in amber when the gear up lock is engaged, whereas the gear is down locked (information from the LGCIU 1 and 2).
It is not displayed in all other cases.
I. Item 6: Nose L/G position
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL (1) Case 1
The symbol is green when the NLG is locked down and not locked up.
The symbol is green when the NLG is locked down and not locked up.
(2) Case 2
The symbol is red when the NLG is not locked up and not locked down.
The symbol is red when the NLG is not locked up and not locked down.
(3) Case 3
The symbol is not shown when the NLG is not locked down and is locked up.
The symbol is not shown when the NLG is not locked down and is locked up.
(4) Case 4
The left symbol changes to amber XX when the signals from Landing Gear Control and Interface Unit 1 (LGCIU1) to the Display Management Computer (DMC) are not correct.
The right symbol changes to amber XX when the signals from LGCIU2 to the DMC are not correct.
The left symbol changes to amber XX when the signals from Landing Gear Control and Interface Unit 1 (LGCIU1) to the Display Management Computer (DMC) are not correct.
The right symbol changes to amber XX when the signals from LGCIU2 to the DMC are not correct.
J. Item 5: NLG position
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL (1) Case 1
The Nose Landing Gear (NLG) is green (fully colored) when the corresponding gear is downlocked.
The Nose Landing Gear (NLG) is green (fully colored) when the corresponding gear is downlocked.
(2) Case 2
The NLG is red (fully colored) when the corresponding gear is not uplocked and not downlocked.
The NLG is red (fully colored) when the corresponding gear is not uplocked and not downlocked.
(3) Case 3
The NLG is not displayed when the corresponding gear is uplocked.
The NLG is not displayed when the corresponding gear is uplocked.
(4) Case 4
The NLG is replaced by amber XX when its position is not available from neither LGCIU.
The NLG is replaced by amber XX when its position is not available from neither LGCIU.
(5) NOSE WHEEL STEERING Message
This message, normally not displayed, is displayed in amber when:
This message, normally not displayed, is displayed in amber when:
- The nose wheel steering is inoperative as transmitted by the SDAC
or - The ANTI SKID is OFF as transmitted by the SDAC
or - Both BSCU channels are faulty as transmitted by the SDAC
or - The Yellow hydraulic circuit is low pressure.
(6) NOSE WHEEL STEERING Message
This message, normally not displayed, is displayed in amber when:
This message, normally not displayed, is displayed in amber when:
- the nose wheel steering is inoperative as transmitted by the SDAC,
- or the ANTI SKID is OFF as transmitted by the SDAC,
- or both BSCU channels are faulty as transmitted by the SDAC,
K. Item 7: Right landing gear operation
Refer to item 1
Refer to item 1
L. Item 6: Right L/G position
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL
Refer to the Left L/G para. as the same principles apply.
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL M. Item 8: Brake temperature
The digits for the brake temperature value are normally displayed in green (from 0 to 995°C by step of 5°C).
They are displayed in amber when an over heat occurs on the corresponding brake as transmitted by the SDAC. They remain displayed in green when the overheat signal is not transmitted correctly.
The value is replaced by amber XX when transmitted as not valid by the SDAC.
The digits for the brake temperature value are normally displayed in green (from 0 to 995°C by step of 5°C).
They are displayed in amber when an over heat occurs on the corresponding brake as transmitted by the SDAC. They remain displayed in green when the overheat signal is not transmitted correctly.
The value is replaced by amber XX when transmitted as not valid by the SDAC.
N. Item 9: Wheel number
The wheel number is shown in white. Only the brake release parameter changes (refer to Para. N.).
The wheel number is shown in white. Only the brake release parameter changes (refer to Para. N.).
O. Item 10: Tire pressure indication (optional)
Normally, the pressure of the related wheel is shown in green, but when the pressure is low, it is shown in amber.
When the System Data Acquisition Concentrator (SDAC) does not transmit the low pressure information correctly, the amber XX indication is shown.
The value can change from 0 psi (0 bar) to 255 psi (17.58 bar) in increments of 5 psi (0.34 bar).
Normally, the pressure of the related wheel is shown in green, but when the pressure is low, it is shown in amber.
When the System Data Acquisition Concentrator (SDAC) does not transmit the low pressure information correctly, the amber XX indication is shown.
The value can change from 0 psi (0 bar) to 255 psi (17.58 bar) in increments of 5 psi (0.34 bar).
P. Item 7: Brake temperature
The digits for the brake temperature value are normally displayed in green.
They are displayed in amber when an over heat occurs on the corresponding brake as transmitted by the SDAC. They remain displayed in green when the overheat signal is not transmitted correctly.
Item 9: Wheel number
The wheel number is displayed in white. Only the brake release changes (ref. below).
Item 8: Wheel number
The wheel number is displayed in white. Only the brake release changes (ref. below).
Item 10: Tire pressure indication (optional)
Normally, the pressure of the related wheel is shown in green, but when the pressure is low, it is shown in amber.
When the System Data Acquisition Concentrator (SDAC) does not transmit the low pressure information correctly, the amber XX indication is shown.
The value can change from 0 psi (0 bar) to 255 psi (17.58 bar) in increments of 5 psi (0.34 bar).
Item 11: Brake release
*** basic configuration ***
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
*** option 8-wheel ***
When the brake of the related wheel is released, as transmitted by the SDAC, the small symbol featuring the brakes next to the white REL indication is displayed in green in normal operation on each individual wheel.
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
*** NEW MSG DISPLAY OPTION ACTIVATED ***
In amber on each individual wheel if there is a brake released fault
or
In amber for all wheels in same time in case of:
Loss of the ALTN BRK function on the left or right wheels
AND
Loss of the NORM breaking function
or
Loss of both BSCU
or
ANTI SKID is fault and nose wheel steering capability installed
or
ANTI SKID is selected OFF
or
Yellow and Green hydraulic system is low pressure.
It is not displayed when the brake is not released or when information is not transmitted correctly by the SDAC.
Item 11: Brake release
*** basic configuration ***
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
*** option 8-wheel ***
When the brake of the related wheel is released, as transmitted by the SDAC, the small symbol featuring the brakes next to the white REL indication is displayed in green in normal operation on each individual wheel.
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
*** NEW MSG DISPLAY OPTION ACTIVATED ***
In amber on each individual wheel if there is a brake released fault. Or in amber for all wheels in same time in case of loss of the NORM breaking function, or loss of the ANTISKID function together with the loss of the ALTN BRK function on the left wheels or on the right wheels.
It is not displayed when the brake is not released or when information is not transmitted correctly by the SDAC.
Item 09: Brake release
When the brake of the related wheel is released, as transmitted by the SDAC, the REL symbol (green lines) is displayed with the REL cyan indication.The REL symbol is not displayed when the brake is not released or when the information is not transmitted correctly.
The digits for the brake temperature value are normally displayed in green.
They are displayed in amber when an over heat occurs on the corresponding brake as transmitted by the SDAC. They remain displayed in green when the overheat signal is not transmitted correctly.
Item 9: Wheel number
The wheel number is displayed in white. Only the brake release changes (ref. below).
Item 8: Wheel number
The wheel number is displayed in white. Only the brake release changes (ref. below).
Item 10: Tire pressure indication (optional)
Normally, the pressure of the related wheel is shown in green, but when the pressure is low, it is shown in amber.
When the System Data Acquisition Concentrator (SDAC) does not transmit the low pressure information correctly, the amber XX indication is shown.
The value can change from 0 psi (0 bar) to 255 psi (17.58 bar) in increments of 5 psi (0.34 bar).
Item 11: Brake release
*** basic configuration ***
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
*** option 8-wheel ***
When the brake of the related wheel is released, as transmitted by the SDAC, the small symbol featuring the brakes next to the white REL indication is displayed in green in normal operation on each individual wheel.
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
*** NEW MSG DISPLAY OPTION ACTIVATED ***
In amber on each individual wheel if there is a brake released fault
or
In amber for all wheels in same time in case of:
Loss of the ALTN BRK function on the left or right wheels
AND
Loss of the NORM breaking function
or
Loss of both BSCU
or
ANTI SKID is fault and nose wheel steering capability installed
or
ANTI SKID is selected OFF
or
Yellow and Green hydraulic system is low pressure.
It is not displayed when the brake is not released or when information is not transmitted correctly by the SDAC.
Item 11: Brake release
*** basic configuration ***
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
*** option 8-wheel ***
When the brake of the related wheel is released, as transmitted by the SDAC, the small symbol featuring the brakes next to the white REL indication is displayed in green in normal operation on each individual wheel.
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
*** NEW MSG DISPLAY OPTION ACTIVATED ***
In amber on each individual wheel if there is a brake released fault. Or in amber for all wheels in same time in case of loss of the NORM breaking function, or loss of the ANTISKID function together with the loss of the ALTN BRK function on the left wheels or on the right wheels.
It is not displayed when the brake is not released or when information is not transmitted correctly by the SDAC.
Item 09: Brake release
When the brake of the related wheel is released, as transmitted by the SDAC, the REL symbol (green lines) is displayed with the REL cyan indication.The REL symbol is not displayed when the brake is not released or when the information is not transmitted correctly.
Q. Item 11: Brake release
Configuration 1: The new brake message and the new brake system options are not installed.
Configuration 2: The new brake message option is installed and the new brake system option is not installed.
Configuration 3: The new brake message and the new brake system options are installed.
***Configuration 1***
Four or eight wheels:
The release indication is shown in green for each wheel, when the wheel brake release is in the normal operation condition.
***End of configuration 1***
***Configuration 2***
Four wheels:
The indication is shown in amber for all the wheels at the same time when:
The indication is shown in amber for all the wheels at the same time when:
***Configuration 3***
Four wheels:
The indication is shown in amber for all the wheels at the same time when:
The indication is shown in amber for all the wheels at the same time when:
Configuration 1: The new brake message and the new brake system options are not installed.
Configuration 2: The new brake message option is installed and the new brake system option is not installed.
Configuration 3: The new brake message and the new brake system options are installed.
***Configuration 1***
Four or eight wheels:
The release indication is shown in green for each wheel, when the wheel brake release is in the normal operation condition.
***End of configuration 1***
***Configuration 2***
Four wheels:
The indication is shown in amber for all the wheels at the same time when:
- There is a fault of the left or right alternate brake-release, and
- The alternate braking mode is on or the ANTI SKID message is shown in amber.
- The brake release indication is not shown in amber for all the wheels, and
- The wheel brake release indication is shown in amber.
- The brake release indication is not shown in amber for all the wheels, and
- The wheel brake release is in the normal operation condition.
The indication is shown in amber for all the wheels at the same time when:
- There is a fault of the left or right alternate brake-release, and
- The alternate braking mode is on or the ANTI SKID message is shown in amber.
- The brake release indication is not shown in amber for all the wheels, and
- The wheel brake release is in the normal operation condition.
***Configuration 3***
Four wheels:
The indication is shown in amber for all the wheels at the same time when:
- There is a fault of the left and right alternate brake-release, and
- The alternate braking mode is on or the ANTI SKID message is shown in amber.
- The brake release indication is not shown in amber for all the wheels, and
- The wheel brake-release indication is shown in amber.
The indication is shown in amber for all the wheels at the same time when:
- There is a fault of the left or right alternate brake-release, and
- The alternate braking mode is on or the ANTI SKID message is shown in amber.
- The brake release indication is not shown in amber for all the wheels, and
- The wheel brake release is in the normal operation condition.
R. Item 12: Normal and Alternate Braking Messages
Configuration 1: The Enhanced Message Display option and the New Message Display option are not activated.
Configuration 2: The Enhanced Message Display option is activated and the New Message Display option is not activated.
Configuration 3: The Enhanced Message Display option and the New Message Display option are activated.
Configuration 1: The Enhanced Message Display option and the New Message Display option are not activated.
Configuration 2: The Enhanced Message Display option is activated and the New Message Display option is not activated.
Configuration 3: The Enhanced Message Display option and the New Message Display option are activated.
(1) ANTI SKID Message
This message, normally not displayed, is displayed in amber when:
This message, normally not displayed, is displayed in amber when:
- the anti skid switch is OFF as transmitted by the SDAC,
- or both BSCU channels are faulty as transmitted by the SDAC.
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
(2) ANTI SKID Message
This message, normally not displayed, is displayed in green when:
*** NEW MSG DISPLAY OPTION ACTIVATED ***
This message, normally not displayed, is displayed in green when:
- The message NORM BRK is displayed in amber,
- or the message ALTN BRK is displayed in amber,
- or the message AUTO BRK is displayed in amber.
- the anti skid switch is OFF,
- or both BSCU channels are faulty as transmitted by the SDAC,
- or the message NORM BRK is displayed in amber and the pressure of the yellow hydraulic circuit is low.
*** NEW MSG DISPLAY OPTION ACTIVATED ***
(3) System 1/2 related to ANTI SKID status
At the same time as the ANTI SKID message, the status of the BSCU system 1 is displayed.
Likewise the system 2 is displayed
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
At the same time as the ANTI SKID message, the status of the BSCU system 1 is displayed.
- normally displayed in green
- the figure is displayed in amber when the BSCU system 1 is faulty.
- the figure is surrounded by a half grey box.
Likewise the system 2 is displayed
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
(4) NORM BRK Message
This message, normally not displayed, is displayed in green when:
This message, normally not displayed, is displayed in green when:
- the message ALTN BRK is displayed in amber,
- or the message AUTO BRK is displayed in amber.
- the anti skid switch is OFF as transmitted by the SDAC
- or both BSCU channels are faulty as transmitted by the SDAC
- or the normal brake system is faulty,
- or the GREEN hydraulic circuit pressure is low.
(5) ALTN BRK Message
This message, normally not displayed, is displayed green when:
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
*** NEW MSG DISPLAY OPTION ACTIVATED ***
This message, normally not displayed, is displayed green when:
- the alternate braking mode is selected
- and neither the GREEN nor the YELLOW pressure are low
- and the ANTI SKID switch is not OFF as transmitted by the SDAC, and both BSCU channels are not faulty as transmitted by the SDAC.
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
*** NEW MSG DISPLAY OPTION ACTIVATED ***
(6) ALTN BRK Message
This message, normally not displayed, is displayed in green when:
*** NEW MSG DISPLAY OPTION ACTIVATED ***
This message, normally not displayed, is displayed in green when:
- the alternate braking mode is ON
- and neither the GREEN nor the YELLOW hydraulic pressure are low
- and the anti skid switch is not OFF
- and neither BSCU channel is faulty as transmitted by the SDAC
- or the message NORM BRK is displayed in amber,
- or the message AUTO BRK is displayed in amber.
- there is an alternate braking left and right release fault,
- or the YELLOW pressure and the YELLOW accumulator pressure are low,
*** NEW MSG DISPLAY OPTION ACTIVATED ***
(7) ACCU PRESS Message
ACCU PRESS message is displayed in green when:
ACCU PRESS message is displayed in green when:
- NORM BRK, or ALTN BRK, or AUTO BRK, or ANTI SKID is displayed in amber,
- together with a YELLOW hydraulic low pressure.
- or when yellow hydraulic circuit is low pressure.
*** NEW MSG DISPLAY OPTION ACTIVATED ***
(8) ACCU PRESS is displayed in amber when:
- the YELLOW accumulator undergoes a low pressure
*** NEW MSG DISPLAY OPTION ACTIVATED ***
(9) ACCU ONLY is displayed in green when:
*** NEW MSG DSPLAY OPTION ACTIVATED ***
- the YELLOW hydraulic circuit undergoes a low pressure, and the NORMAL brake mode is faulty (NORM BRK in amber)
- or the YELLOW hydraulic circuit undergoes a low pressure.
*** NEW MSG DSPLAY OPTION ACTIVATED ***
(10) Arrow indication
This arrow is always displayed in green, when an ACCU message is displayed, whatever the message (ACCU PRESS or ACCU ONLY), and whatever the color.
This arrow is always displayed in green, when an ACCU message is displayed, whatever the message (ACCU PRESS or ACCU ONLY), and whatever the color.
- the arrow shows the YELLOW hydraulic circuit supplying the accumulator, when the YELLOW hydraulic circuit does not undergo a low pressure.
- the arrow shows the YELLOW accumulator supplying the alternate braking mode, when the YELLOW hydraulic circuit undergoes a low pressure.
(11) AUTO BRK Message
This message is displayed in amber when:
At least two SEC ground spoiler are faulty or invalid
or
When the auto break is faulty
or
When both BSCU command or monitor are faulty
or
When ANTI SKID is OFF or when ANTI SKID is fault and nose wheel steering capability installed.
The message is green and flashing for 10s when the auto brake mode is OFF.
The message is green when a decelerating mode is armed.
The message is not displayed in all other cases.
This message is displayed in amber when:
At least two SEC ground spoiler are faulty or invalid
or
When the auto break is faulty
or
When both BSCU command or monitor are faulty
or
When ANTI SKID is OFF or when ANTI SKID is fault and nose wheel steering capability installed.
The message is green and flashing for 10s when the auto brake mode is OFF.
The message is green when a decelerating mode is armed.
The message is not displayed in all other cases.
(12) LOW, MED, MAX decelerating mode message
- LOW is displayed in green when the low decelerating mode is engaged
- MED is displayed in green when the medium decelerating mode is engaged
- MAX is displayed in green when the maximum decelerating mode is engaged
(13) ANTI SKID Message
This message, normally not displayed, is displayed in amber when:
This message, normally not displayed, is displayed in amber when:
- the anti skid switch is OFF as transmitted by the SDAC,
- or both BSCU channels are faulty as transmitted by the SDAC.
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
(14) ANTI SKID Message
This message, normally not displayed, is displayed in green when:
*** NEW MSG DISPLAY OPTION ACTIVATED ***
This message, normally not displayed, is displayed in green when:
- The message NORM BRK is displayed in amber,
- or the message ALTN BRK is displayed in amber,
- or the message AUTO BRK is displayed in amber.
- the anti skid switch is OFF,
- or both BSCU channels are faulty as transmitted by the SDAC,
- or the message NORM BRK is displayed in amber and the pressure of the yellow hydraulic circuit is low.
*** NEW MSG DISPLAY OPTION ACTIVATED ***
(15) System 1/2 related to ANTI SKID status
At the same time as the ANTI SKID message, the status of the BSCU system 1 is displayed.
Likewise the system 2 is displayed
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
At the same time as the ANTI SKID message, the status of the BSCU system 1 is displayed.
- normally displayed in green
- the figure is displayed in amber when the BSCU system 1 is faulty.
- the figure is surrounded by a half grey box.
Likewise the system 2 is displayed
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
(16) NORM BRK Message
This message, normally not displayed, is displayed in green when:
This message, normally not displayed, is displayed in green when:
- the message ALTN BRK is displayed in amber,
- or the message AUTO BRK is displayed in amber.
- the anti skid switch is OFF as transmitted by the SDAC
- or both BSCU channels are faulty as transmitted by the SDAC
- or the normal brake system is faulty,
- or the GREEN hydraulic circuit pressure is low.
(17) ALTN BRK Message
This message, normally not displayed, is displayed green when:
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
*** NEW MSG DISPLAY OPTION ACTIVATED ***
This message, normally not displayed, is displayed green when:
- the alternate braking mode is selected
- and neither the GREEN nor the YELLOW pressure are low
- and the ANTI SKID switch is not OFF as transmitted by the SDAC, and both BSCU channels are not faulty as transmitted by the SDAC.
*** ENHANCED MSG DISPLAY OPTION ACTIVATED ***
*** NEW MSG DISPLAY OPTION ACTIVATED ***
(18) ALTN BRK Message
This message, normally not displayed, is displayed in green when:
*** NEW MSG DISPLAY OPTION ACTIVATED ***
This message, normally not displayed, is displayed in green when:
- the alternate braking mode is ON
- and neither the GREEN nor the YELLOW hydraulic pressure are low
- and the anti skid switch is not OFF
- and neither BSCU channel is faulty as transmitted by the SDAC
- or the message NORM BRK is displayed in amber,
- or the message AUTO BRK is displayed in amber.
- there is an alternate braking left and right release fault,
- or the YELLOW pressure and the YELLOW accumulator pressure are low,
*** NEW MSG DISPLAY OPTION ACTIVATED ***
(19) ACCU PRESS Message
ACCU PRESS message is displayed in green when:
ACCU PRESS message is displayed in green when:
- NORM BRK, or ALTN BRK, or AUTO BRK, or ANTI SKID is displayed in amber,
- together with a YELLOW hydraulic low pressure.
- or when yellow hydraulic circuit is low pressure.
*** NEW MSG DISPLAY OPTION ACTIVATED ***
(20) ACCU PRESS is displayed in amber when:
- the YELLOW accumulator undergoes a low pressure
*** NEW MSG DISPLAY OPTION ACTIVATED ***
(21) ACCU ONLY is displayed in green when:
*** NEW MSG DSPLAY OPTION ACTIVATED ***
- the YELLOW hydraulic circuit undergoes a low pressure, and the NORMAL brake mode is faulty (NORM BRK in amber)
- or the YELLOW hydraulic circuit undergoes a low pressure.
*** NEW MSG DSPLAY OPTION ACTIVATED ***
(22) Arrow indication
This arrow is always displayed in green, when an ACCU message is displayed, whatever the message (ACCU PRESS or ACCU ONLY), and whatever the color.
This arrow is always displayed in green, when an ACCU message is displayed, whatever the message (ACCU PRESS or ACCU ONLY), and whatever the color.
- the arrow shows the YELLOW hydraulic circuit supplying the accumulator, when the YELLOW hydraulic circuit does not undergo a low pressure.
- the arrow shows the YELLOW accumulator supplying the alternate braking mode, when the YELLOW hydraulic circuit undergoes a low pressure.
(23) AUTO BRK Message
This message is displayed in amber when:
The message is green when a decelerating mode is armed.
The message is not displayed in all other cases.
This message is displayed in amber when:
- the anti skid switch is OFF or both BSCU channels are faulty as transmitted by the SDAC, or the auto braking mode is faulty
The message is green when a decelerating mode is armed.
The message is not displayed in all other cases.
(24) LOW, MED, MAX decelerating mode message
- LOW is displayed in green when the low decelerating mode is engaged
- MED is displayed in green when the medium decelerating mode is engaged
- MAX is displayed in green when the maximum decelerating mode is engaged
(25) The ANTI SKID message
***Configuration 1***
This message, usually not shown, is shown in amber when:
***Configuration 2***
This message, usually not shown, comes into view in green if one of the messages that follow is shown:
***Configuration 3***
This message, usually not shown, comes into view in green if one of the messages that follow is shown:
***Configuration 1***
This message, usually not shown, is shown in amber when:
- The A/SKID switch is in the OFF position, or
- The SDAC transmits the information that the two Braking and Steering Control Unit (BSCU) channels are defective.
***Configuration 2***
This message, usually not shown, comes into view in green if one of the messages that follow is shown:
- The NORM BRK message is shown in amber, or
- The ALTN BRK message is shown in amber, or
- The AUTO BRK message is shown in amber.
- The A/SKID switch is in the OFF position, or
- The SDAC transmits the information that the two BSCU channels are defective, or
- The NORM BRK message is shown in amber and the pressure in the Yellow hydraulic circuit is low.
***Configuration 3***
This message, usually not shown, comes into view in green if one of the messages that follow is shown:
- The NORM BRK message is shown in amber or green, or
- The ALTN BRK message is shown in amber, or
- The AUTO BRK message is shown in amber.
- The A/SKID switch is in the OFF position, or
- The SDAC transmits the information that the two BSCU channels are defective, or
- The NORM BRK message is shown in amber and the pressure of the Yellow hydraulic circuit is low, or
- The nose-wheel steering function is available when the A/SKID switch is in the OFF position.
At the same time as the ANTI SKID message comes into view, the status of BSCU system 1 is shown. - In normal conditions, the figure is shown in green.
- When BSCU system 1 is defective, the figure is shown in amber.
- The half-box in gray is shown around the figure.
The indications for BSCU system 2 are the same as for system 1.
(26) The NORM BRK message
***Configuration 2***
This message, usually not shown, comes into view in green when:
***Configuration 3***
This message, usually not shown, comes into view in green if one of the conditions that follow occurs:
***Configuration 2***
This message, usually not shown, comes into view in green when:
- The ALTN BRK message is shown in amber, or
- The AUTO BRK message is shown in amber.
- The A/SKID switch is in the OFF position, or
- The SDAC transmits the information that the two BSCU channels are defective, or
- The alternate braking mode is on, or
- The pressure in the Green hydraulic circuit is low.
***Configuration 3***
This message, usually not shown, comes into view in green if one of the conditions that follow occurs:
- There is a fault of the alternate left and right brake release, or
- The AUTO BRK message is shown in amber, or
- The pressure of the Yellow hydraulic circuit is low, or
- The SDAC transmits the information that the BSCU 1 channel is defective, or
- The SDAC transmits the information that the BSCU 2 channel is defective, or
- The pressure of the Yellow accumulator is low.
- The SDAC transmits the information that the A/SKID switch is in the OFF position, or
- The two BSCU channels are defective, or
- The alternate braking mode is on, or
- The pressure of the Green hydraulic circuit is low, or
- The nose-wheel steering function is available when the A/SKID switch is in the OFF position.
(27) The ALTN BRK message
***Configuration 1***
This message, usually not shown, comes into view in green when:
***Configuration 2***
This message, usually not shown, comes into view in green if all of the conditions that follow occur:
***Configuration 3***
This message, usually not shown, comes into view in green if one of the conditions that follow occurs:
***Configuration 1***
This message, usually not shown, comes into view in green when:
- The alternate braking mode is on, and
- The pressure in the Green or the Yellow hydraulic circuit is not low, and
- The A/SKID switch is not in the OFF position, and
- The SDAC transmits the information that a minimum of one of the BSCU channels is not defective.
***Configuration 2***
This message, usually not shown, comes into view in green if all of the conditions that follow occur:
- The alternate braking mode is on, and
- The pressure of the Green or the Yellow hydraulic circuit is not low, and
- The SDAC transmits the information that the A/SKID switch is not in the OFF position and the BSCU 1 channel or the BSCU 2 channel is not defective, or
- The NORM BRK message is shown in amber, or
- The AUTO BRK message is shown in amber.
- There is a fault of the alternate left and right brake release, or
- The Yellow hydraulic-circuit pressure and the Yellow accumulator pressure are low.
***Configuration 3***
This message, usually not shown, comes into view in green if one of the conditions that follow occurs:
- The NORM BRK message is shown in amber or green, or
- The AUTO BRK message is shown in amber, or
- The Green or the Yellow hydraulic-circuit pressure is not low, and
- The alternate braking mode is on.
- The nose wheel steering function is available when the A/SKID switch is in the OFF position.
- The SDAC transmits the information that the BSCU 1 channel or BSCU 2 channel is not defective.
- The A/SKID switch is not in the OFF position.
- There is a fault of the alternate left and right brake release, or
- The Yellow hydraulic-circuit pressure and the Yellow accumulator pressure are low.
(28) The ACCU PRESS message
***Configuration 3***
The ACCU PRESS message is shown in green when:
***Configuration 3***
The ACCU PRESS message is shown in green when:
- The NORM BRK or ALTN BRK or AUTO BRK or ANTI SKID message is shown in amber and the pressure in the Yellow hydraulic circuit is not low, or
- The pressure in the Yellow hydraulic circuit is low.
- The pressure in the Yellow accumulator is low.
(29) The ACCU ONLY message
***Configuration 3***
The ACCU ONLY message is shown in green when:
***Configuration 3***
The ACCU ONLY message is shown in green when:
- The pressure in the Yellow hydraulic circuit is low, and the NORMAL brake mode is defective (the NORM BRK message is shown in amber).
(30) Arrow indication
***Configuration 3***
This arrow is always shown in green, when the ACCU message comes into view. It refers to all the ACCU messages (ACCU PRESS or ACCU ONLY), shown in all colors:
***Configuration 3***
This arrow is always shown in green, when the ACCU message comes into view. It refers to all the ACCU messages (ACCU PRESS or ACCU ONLY), shown in all colors:
- The arrow shows the Yellow hydraulic circuit that supplies the accumulator, when the pressure in the Yellow hydraulic circuit is not low.
- The arrow shows the Yellow accumulator that supplies the alternate braking mode, when the pressure in the Yellow hydraulic circuit is low.
(31) The AUTO BRK message
***Configurations 1 and 2***
This message is shown in amber when an autobrake fault is confirmed, and
***Configuration 3***
This message is shown in amber when the autobrake fault is confirmed and:
***For configurations 1, 2 and 3***
The AUTO BRK message is shown in green and flashes for 10 seconds when the autobrake mode is off and the autobrake fault is confirmed.
The message is shown in green when one of the deceleration rate modes is armed and the autobrake fault is confirmed.
The message is not shown in all the other conditions.
***End of configurations 1, 2 and 3***
***Configurations 1 and 2***
This message is shown in amber when an autobrake fault is confirmed, and
- A minimum of two SEC ground spoilers are defective, or
- The autobrake is defective, or
- The two BSCU commands or monitors are defective, or
- The ANTI SKID is off.
***Configuration 3***
This message is shown in amber when the autobrake fault is confirmed and:
- A minimum of two SEC ground spoilers are defective, or
- The autobrake is defective, or
- The two BSCU commands or monitors are defective, or
- The ANTI SKID is off, or
- The nose-wheel steering function is available when the A/SKID switch is in the OFF position.
***For configurations 1, 2 and 3***
The AUTO BRK message is shown in green and flashes for 10 seconds when the autobrake mode is off and the autobrake fault is confirmed.
The message is shown in green when one of the deceleration rate modes is armed and the autobrake fault is confirmed.
The message is not shown in all the other conditions.
***End of configurations 1, 2 and 3***
(32) The LOW, MED, MAX deceleration mode messages
***For configurations 1, 2 and 3***
***End of configuration 1, 2 and 3***
***For configurations 1, 2 and 3***
- The LOW message is shown in green when the low deceleration rate mode is armed.
- The MED message is shown in green when the medium deceleration rate mode is armed.
- The MAX message is shown in green when the maximum deceleration rate mode is armed.
***End of configuration 1, 2 and 3***
S. Item 10/Item 11: Spoiler status indication
(1) Case 1
The spoiler is represented out and green, when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is extended and available, also from the FCDC bus.
The spoiler is represented out and green, when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is extended and available, also from the FCDC bus.
(2) Case 2
The spoiler is represented in and green, when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is retracted and available, also from the FCDC bus.
The spoiler is represented in and green, when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is retracted and available, also from the FCDC bus.
(3) Case 3
The spoiler is represented out and amber when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is extended and faulty, as transmitted from the FCDC bus.
The spoiler is represented out and amber when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is extended and faulty, as transmitted from the FCDC bus.
(4) Case 4
The spoiler is represented in and amber when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is retracted and faulty, as transmitted from the FCDC bus.
The spoiler is represented in and amber when the spoiler status is transmitted correctly from the FCDC bus, the spoiler is retracted and faulty, as transmitted from the FCDC bus.
(5) Case 5
The spoiler is replaced by amber XX when the spoiler status is transmitted as not valid from the FCDC bus, or the information is not transmitted correctly from the FCDC bus.
The spoiler is replaced by amber XX when the spoiler status is transmitted as not valid from the FCDC bus, or the information is not transmitted correctly from the FCDC bus.
T. Item 13: L/G CTL Message
This message is displayed in amber,
This message is displayed in amber,
- when the gear lever selector is in the UP position as transmitted by the LGCIU1, or 2 and the nose gear, the main right gear, or the main left gear are not UP
- or the gear lever selector is in the DOWN position as transmitted by the LGCIU1, or 2 and the nose gear, the main right gear, or the main left gear are not DOWN
U. Item 11/Item 12: Braking mode
(1) ALTN BRK message
The message is displayed in green when the alternate braking has been selected, provided that the green or the yellow hydraulic pressure is available, and there is no antiskid fault. Otherwise it is not displayed.
The message is displayed in green when the alternate braking has been selected, provided that the green or the yellow hydraulic pressure is available, and there is no antiskid fault. Otherwise it is not displayed.
(2) Autobrake selection
(a) Case 1
The message AUTO BRK is displayed in green steady when a DECEL rate is armed.
The message AUTO BRK is displayed in green steady when a DECEL rate is armed.
(b) Case 2
It is displayed in green flashing when the autobrake is OFF.
It is displayed in green flashing when the autobrake is OFF.
(c) Case 3
It is displayed in amber when there is an autobrake fault, or an antiskid fault.
It is displayed in amber when there is an autobrake fault, or an antiskid fault.
(d) Case 4
It is not displayed in all the other cases or when these pieces of information are not correctly transmitted from the BSCU via the SDAC.
It is not displayed in all the other cases or when these pieces of information are not correctly transmitted from the BSCU via the SDAC.
(3) Autobrake mode
armed.
armed.
(a) The MED message is displayed in green when the MED rate of DECEL has been armed.
(b) The LO message is displayed in green when the LOW rate of DECEL has been armed.
(c) Nothing is displayed when no rate of DECEL has been armed.
(4) ALTN BRK message
The message is displayed in green when the alternate braking has been selected, provided that the Green or the Yellow hydraulic pressure is available, and there is no antiskid fault. Otherwise it is not displayed.
The message is displayed in green when the alternate braking has been selected, provided that the Green or the Yellow hydraulic pressure is available, and there is no antiskid fault. Otherwise it is not displayed.
(5) Autobrake selection
(a) Case 1
The message AUTO BRK is displayed in green steady when a DECEL rate is armed.
The message AUTO BRK is displayed in green steady when a DECEL rate is armed.
(b) Case 2
It is displayed in green flashing when the autobrake is OFF.
It is displayed in green flashing when the autobrake is OFF.
(c) Case 3
It is displayed in amber when there is an autobrake fault, or an antiskid fault.
It is displayed in amber when there is an autobrake fault, or an antiskid fault.
(d) Case 4
It is not displayed in all the other cases or when these pieces of information are not correctly transmitted from the BSCU via the SDAC.
It is not displayed in all the other cases or when these pieces of information are not correctly transmitted from the BSCU via the SDAC.
(6) Autobrake mode
armed.
armed.
(a) The MED message is displayed in green when the MED rate of DECEL has been armed.
(b) The LO message is displayed in green when the LOW rate of DECEL has been armed.
(c) Nothing is displayed when no rate of DECEL has been armed.
V. Item 12/Item 13: Hottest brake indication
(1) A green arc (case 1) is displayed on the hottest wheel when the related temperature is higher than 100°C and there is no overheat on the brake.
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL (2) The arc is displayed in amber (case 2) when there is an overheat.
(3) No arc is displayed when the temperature is lower than 100°C.
(4) The same arc is displayed in grey (case 3) when the related wheel is not the hottest wheel and in all other cases.
W. Item 13: L/G CTL Message
(see above)
(see above)
X. Item 14: Hydraulic status
*** NEW MSG DISPLAY OPTION ACTIVATED ***
The hydraulic supply indications are displayed at the same time as the message N/W STEERING, or the message NORM BRK, or the message ALTN BRK
Y refer to the YELLOW hydraulic status, while G refer to the GREEN hydraulic status. The letter, normally displayed in green, is displayed in amber in case of low pressure. The hydraulic status is not displayed when not transmitted as valid by the SDAC.
*** NEW MSG DISPLAY OPTION ACTIVATED ***
The hydraulic supply indications are displayed at the same time as the message N/W STEERING, or the message NORM BRK, or the message ALTN BRK
Y refer to the YELLOW hydraulic status, while G refer to the GREEN hydraulic status. The letter, normally displayed in green, is displayed in amber in case of low pressure. The hydraulic status is not displayed when not transmitted as valid by the SDAC.
Y. Item 15: Hottest Brake indication
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL
Case 1
A green arc is displayed on the hottest wheel when the related temperature is higher than 100°C and there is no overheat on the brake.
Case 2
The arc is displayed in amber when there is an overheat.
Case 3
The same arc is displayed in grey when the related wheel is not the hottest wheel and in all other cases.
WHEEL Page - Display of the Parameters: NOSE LANDING GEAR and DOOR, HOTTEST WHEEL ** ON A/C NOT FOR ALL A green arc is displayed on the hottest wheel when the related temperature is higher than 100°C and there is no overheat on the brake.
Case 2
The arc is displayed in amber when there is an overheat.
Case 3
The same arc is displayed in grey when the related wheel is not the hottest wheel and in all other cases.
Z. Item 16: N/W STEERING message
Configuration 1: The Enhanced Message Display option and the New Message Display option are not activated.
Configuration 2: The Enhanced Message Display option is activated and the New Message Display option is not activated.
Configuration 3: The Enhanced Message Display option and the New Message Display option are activated.
Configuration 1: The Enhanced Message Display option and the New Message Display option are not activated.
Configuration 2: The Enhanced Message Display option is activated and the New Message Display option is not activated.
Configuration 3: The Enhanced Message Display option and the New Message Display option are activated.
(1) The N/W STEERING message
***Configurations 1 and 2***
This message, usually not shown, comes into view in amber when the fault of the nose wheel steering is confirmed and:
***Configuration 3***
This message, usually not shown, comes into view in green when the nose-wheel steering function is available, and:
***Configurations 1 and 2***
This message, usually not shown, comes into view in amber when the fault of the nose wheel steering is confirmed and:
- The nose wheel steering is defective, or
- The A/SKID switch is in the OFF position, or
- The System Data Acquisition Concentrator (SDAC) transmits the information that the two Braking and Steering Control Unit (BSCU) channels are defective.
***Configuration 3***
This message, usually not shown, comes into view in green when the nose-wheel steering function is available, and:
- The nose-wheel steering fault is confirmed, and
- The nose wheel steering is not defective, and
- The A/SKID switch is in the OFF position or the ANTI SKID is defective.
- The SDAC transmits the information that the nose wheel steering is correct, and one of the conditions that follow is confirmed:
- The pressure in the Yellow hydraulic circuit is low, or
- The SDAC transmits the information that the nose wheel steering is defective, or
- The SDAC transmits the information that the two BSCU channels are defective.
- The nose-wheel steering fault is confirmed, and one of the conditions that follow is confirmed:
- The pressure in the Yellow hydraulic circuit is low, or
- The A/SKID switch is in the OFF position, or
- The SDAC transmits the information that the nose wheel steering is defective, or
- The SDAC transmits the information that the two BSCU channels are defective.