FMS DEGRADED OPERATION
14 FMGC RESETS or FAILURES
2.5. Automatic Double Reset of both FMGCs
As after one reset, internal data are retrieved from internal memory,
the reset "context" has not changed, which can lead to raise, in
exceptional conditions, to the same reset a second time.
In this case all FMSs data would be lost.
INDICATIONS IN THE COCKPIT
On ECAM
− If AP disconnects: Red warning AUTO
FLT AP OFF and aural warning,
MAP NOT AVAIL
− If A/THR disconnects: Amber caution
AUTO FLT A/THR OFF and aural warning.
− CAB PR LDG ELEV FAULT message is
displayed.
On both sides:
ND: red flag MAP NOT AVAIL is displayed.
Navaids auto-tuning is lost.
AP: If engaged, the onside AP & A/THR
may disconnect and managed modes r
to selected modes (HDG-V/S or TRK/FPA).
evert
FMA: Indicates auto-systems degradation.
MCDUs:
− MCDU menu page is displayed with FMGC (REQ) prompt in [1L] field,
followed by FMGC (OWN) prompt in [1L] and SELECT DESIRED
SYSTEM message (white) on scratchpad.
− The amber FM FAIL annunciator illuminates.
FM1 IND RDY FM2
FM1 IND RDY
MCDU MENU
<FMGC (REQ)
<ACARS
<AIDS
<CFDS
RETURN>
SELEC DESIRED SYSTEM T
MCDU MENU
<FMGC (OWN)
<ACARS
<AIDS
<CFDS
RETURN>
SELECT DESIRED SYSTEM
MCDU MENU
<FMGC (REQ)
<ACARS
<AIDS
<CFDS
RETURN>
SELEC DESIRED SYSTEM T
MCDU MENU
<FMGC (OWN)
<ACARS
<AIDS
<CFDS
RETURN>
SELECT DESIRED SYSTEM
J43126AA 00
© THALES AVIONICS S.A.
AIRBUS A318/319/320/321
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