FMS DEGRADED OPERATION
8 FMGC RESETS or FAILURES
Double reset of one FMGC (Cont'd)
After a double reset the affected FMS position is reinitialized to the IRS
position. IRS DRIFT and EPE are reinitialized to zero. IRS drift is
estimated again using GPS (if available) or Radio position. Therefore a
difference may appear between the two FMSs. Select AP accordingly.
OPPOSITE SIDE
AFFECTED SIDE
POSITION MONITOR
FMGC1
5116.6N/00006.5E
3IRS/GPS
FMGC2
5116.6N/00007.0E
3IRS/GPS
GPIRS
5116.7N/00007.1E
MIX IRS
5116.6N/00006.5E
IRS1 IRS2 IRS3
NAV 0.0 NAV 0.0 NAV 0.0
SEL
<FREEZE
NAVAIDS>
FM2
FM1
IND
RDY
FM2
POSITION MONITOR
FMGC1
5116.6N/00006.5E
3IRS/GPS
FMGC2
5116.7N/00007.1E
3IRS/GPS
GPIRS
5116.7N/00007.1E
MIX IRS
5117.6N/00007.8E
IRS1 IRS2 IRS3
NAV 0.8 NAV 1.0 NAV 1.4
SEL
<FREEZE
NAVAIDS>
RDY
IND
FM1
DESCENT THV001
CRZ OPT REC MAX
----- -----
FL398
<REPORT
VDEV=
-
350
FT
UPDATE AT
*
[ ]
BRG /DIST
303° /23.9
TO
EGLL27R
PREDICTIVE
<GPS
GPS PRIMARY
REQUIRED ACCUR ESTIMATED
1.0
NM
HIGH
0.0NM
DESCENT THV001
CRZ OPT REC MAX
----- -----
FL398
<REPORT
VDEV=
-
350
FT
UPDATE AT
*
[ ]
BRG /DIST
303° /23.9
TO
EGLL27R
PREDICTIVE
<GPS
GPS PRIMARY
REQUIRED ACCUR ESTIMATED
1.0
NM
HIGH
0.8NM
Caution
It is not recommended to perform a manual reset with C/B. Pulling
the C/B during the minute following a Double Reset may lead to a
“Degraded mode".
J43126AA 00
© THALES AVIONICS S.A.
AIRBUS A318/319/320/321
Summary of Contents for FMGS
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