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and the navigation method used by the FMGC for that calculation (Example :
“3IRS/DME/DME”).
Line 2 FMS 2 This line shows the latitude and longitude, as calculated by the opposite FMGC, and
the navigation method used.
Line 3 RADIO
or GPS
or GPIRS
This line shows the latitude and longitude, calculated by the onside FMGC from
selected radio navaids (Example : DME/DME, VOR/DME, or LOC) or from GPS or
GPIRS.
Line 4 MIX IRS This line shows the latitude and longitude of the weighted mean inertial reference
system (IRS) calculated by the onside FMGC from the available IRSs.
Line 5 IRS 1,2,3 This line shows the deviation in nautical miles of each IRS position from the onside
FMGC position. It also displays the IRS mode, which can be INVAL, ALIGN, NAV or
ATT.
Note: INVAL is displayed when an ADIRS has failed, or the IRS position is not
refreshed.
[ 6L ] FREEZE/UNFREEZE The pilot presses this key to freeze (or unfreeze) all the data displayed on the page.
When the data is frozen, the title of the page specifies the time at which it was frozen.
[ 6R ] SEL NAVAIDS The pilot presses this key to access the selected navaids page.
SELECTED NAVAIDS PAGE
Applicable to:
MODIFIABLE ONLY FOR DESELECTION
Line 1 This field displays the navaid tuned for display purposes, and the tuning
mode (AUTO, MAN, or RMP).
Line 2 and 3 These fields display the navaids, if any, tuned for the calculation of radio
position by the FMGEC.
[ 4L ] This field displays the tuned ILS (or MLS), if any.
[ 5L ] DESELECT/SELECT GPS The crew presses this key to manually select or deselect the GPS for
position computation. Upon transition to the DONE phase, the prompt
returns to DESELECT status.
If the pilot deselects the GPS, “GPS IS DESELECTED” is displayed
when the aircraft is less than 80 nm from the top of descent, or in
approach phase.
To be continued on next page
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
A318/A319/A320/A321 FLEET DSC-22_20-50-10-25 P 62/104
FCOM 19 AUG 10
Continued from previous page
[ 6L ] RETURN The pilot presses this key to return to the POSITION MONITOR page.
[ 1R ] DESELECT
to
[ 6R ]
The pilot deselects a navaid by entering its identifier in one of these six
fields. Once deselected in this way, the navaid can no longer be tuned
manually through the entry of its ident, nor can it be autotuned for display
or determination of the position for the rest of the flight.
The deselection is cleared :
manually, by a CLR action ‐ into this field, or
‐ automatically upon transition to the done or preflight phase, or upon
activation of the second database.
The pilot may deselect as many as six stations.
IRS MONITOR PAGE
Applicable to:
This page displays the IRS data. The crew calls up this page by pressing the IRS monitor prompt of
the DATA INDEX page.
TITLE DRIFT AT XXXX
(amber)
Displays “DRIFT AT” runway identifier, if at least one IRS average drift is displayed.
[1L] to [3L] IRS 1(2) (3)
(white)
These prompts allow access to the associated IRS pages. Each label line displays the
mode (NAV, ALIGN, ATT or INVAL), the average drift (upon transition to DONE phase),
and the Time To Nav (if IRS in align) for each IRS.
To be continued on next page
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
A318/A319/A320/A321 FLEET DSC-22_20-50-10-25 P 63/104
FCOM 19 AUG 10
Continued from previous page
[1R]
to
[3R]
Displays the status message of the associated IRS in small green font.
List of available messages :
IR FAULT
CHECK C/B
DELAYED MAINT
CDU FAULT
ENTER PPOS
ENTER HEADING
SELECT ATT
REENTER PPOS
EXCESS MOTION
SYS BELOW -15 °
SWITCH ADR
[5R] SET HDG
(white)
This field is displayed, if at least one IRS is in ATT mode.
This function allows initialization of a heading for IRS in ATT mode
If a heading has been entered in this field or on the ADIRS panel, the value is
displayed in blue
If not amber boxes are displayed.
IRS 1 (2)(3) PAGE
This page displays the IRS parameters and GPS/IRS hybrid parameters. The pilot calls up this
page by pressing either the 1L key from the IRS MONITOR page, or the NEXT IRS prompt on
another IRS page (closed loop).
TITLE Displays the selected IRS in large white font.
When data is frozen, IRS is replaced by “IRS FROZEN AT”, followed by the time at
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A320机组操作手册FLIGHT CREW OPERATING MANUAL 1(148)
