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Line 1 FMS 1 This line shows the latitude and longitude, as calculated by
the onside FMGC, 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.
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_20-50-10-28 P 71/126
FCOM 19 AUG 10
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:
,
,
MSN,,
4538,,
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 FMGC.
[ 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.
[ 6L ] RETURN The pilot presses this key to return to the POSITION
MONITOR 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_20-50-10-28 P 72/126
FCOM 19 AUG 10
[ 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 still be manually tuned by entering its ident and
displayed on the ND.
The deselection is cleared :
Manually, ‐ by a CLR action in 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.
If the pilot attemps to deselect a navaid that has been
previously deselected, the “XXX IS DESELECTED”
message is displayed.
IRS MONITOR PAGE
Applicable to:
,
,
MSN,,
4538,,
This page displays the IRS data. The crew calls up this page by pressing the IRS monitor prompt of
the DATA INDEX 1/2 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 access 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 in minutes (if IRS in align) for each IRS.
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_20-50-10-28 P 73/126
FCOM 19 AUG 10
[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.
　
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