Thales FMGS - Page 594

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
1.0NM 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
1.0NM 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
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AIRBUS A318/319/320/321