FLIGHT PHASES
PREFLIGHT
11
AIRBUS A318/319/320/321
© THALES AVIONICS S.A.
J43126AA 00
The alignment can be checked through:
The ECAM MEMO message IRS IN ALIGN X
MN or IRS IN ALIGN. (IRS IN ALIGN
appears if one of the 3 IRS is still in
alignment, this message becomes amber if
one engine is running).
The IRU on the overhead panel,
The MCDU POSITION MONITOR page.
On aircraft with GPS, when alignment is
completed, the white message "GPS
PRIMARY" is triggered on ND and MCDU
scratchpad.
If the IRSs are already in NAV mode,
"RESET IRS TO NAV " s-pad msg (amber)
appears as soon as the content of CO RTE
or FROM/TO fields is changed.
Caution
Do not move a/c until IRS
alignment is complete.
Few seconds after starting the IRS
alignment, map becomes available on ND in
PLAN mode.
IRS IN ALIGN 6 MN
POSITION MONITOR
FMGC1
4338.1N/00122.1E
3IRS/GPS
FMGC2
4338.1N/00122.1E
3IRS/GPS
GPIRS
4338.1N/00122.1E
MIX IRS
4338.1N/00122.1E
IRS1 IRS2 IRS3
ALIGN ALIGN ALIGN
SEL
<FREEZE
NAVAIDS>
POSITION MONITOR
FMGC1
4338.1N/00122.1E
3IRS/GPS
FMGC2
4338.1N/00122.1E
3IRS/GPS
GPIRS
4338.1N/00122.1E
MIX IRS
4338.1N/00122.1E
IRS1 IRS2 IRS3
NAV 0.0 NAV 0.0 NAV 0.0
SEL
<FREEZE
NAVAIDS>
GPS PRIMARY
RESET IRS TO NAV
Summary of Contents for FMGS
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