APPENDICES
2 FMS RESETS
AUTO RESET OF ONE FMGC
Single reset
Double reset
Triple reset
An automatic reset is termed as
double, if a second reset occurs within
one minute after the first.
A reset is termed as triple, if a third
reset occurs within one minute after the
second.
After a triple reset the FMGCs switch
to SINGLE MODE.
ON THE FAILED SIDE
ND
Red flag
MAP NOT AVAILABLE
SET OFF SIDE RNG/MODE
message (amber) is displayed,
if the two ND ranges or modes selected on the EFIS control panels are different
AP - FD -
A/THR
If engaged, AP - A/THR may be lost.
If engaged, managed modes may revert to selected.
If engaged,
AP-FD-A/THR are lost
.
If engaged, managed modes revert to
selected.
FMA
Reflects degradation
Reflects degradation
Failed side
FD
becomes
blank
MCDU
M
ay revert
to MCDU MENU page
R
everts
to MCDU MENU page
FM FAIL
may be momentarily illuminated
FM
FAIL
is illuminated
<FMGC (OPP)
prompt may be momentarily displayed, then replaced by
<FMGC
(OWN)
prompt.
<FMGC (OPP)
prompt is displayed
ON THE OPPOSITE SIDE
ND
Not affected
AP - FD -
A/THR
Not affected
FMA
Reflect degradation
AP/ATHR become
blank
Failed side
FD
becomes
blank
MCDU
IND
momentarily illuminated
On
POSITION MONITOR
page, the
failed FM position remains dashed.
INDEPENDENT OPERATION
message (amber)
momentarily displayed on scratchpad
ECAM and AURAL warning
if AP disconnects:
Red warning AUTO FLT AP OFF and aural warning
Red warning AUTO FLT AP OFF and
aural warning
if A/THR disconnects:
Amber caution AUTO FLT A/THR OFF and aural warning
Amber caution AUTO FLT A/THR OFF
and aural warning
RECOVERY
FMS
All data in affected FM are
saved.
All data in affected FM are
erased,
but
through dual function, the FMGCs
resynchronize
.
Affected FMGC switches to
degraded
mode and is not available.
The affected
FM position is
reinitialized to the IRS position
, and
the EPE is set to zero. A position
difference may appear between
FMGCs.
FMGCs must be used in
SINGLE
mode
AP - A/THR
Re-engage as necessary
Use opposite AP
MCDU
If MCDU MENU page is displayed:
Wait 2 minutes
Select
<FMGC (OWN)
prompt Select
<FMGC (OWN)
prompt Select
<FMGC (OPP)
prompt
Otherwise the current page remains
displayed
OWN FMGC IN PROCESS
message (white) is displayed on scratchpad
ND
If
SET OFF SIDE RNG/MODE
message (amber) is still displayed, recycle EFIS
panel RNG/MODE
The
EFIS panel
on the side of the
remaining FMS must be used for both
NDs display.
MANUAL RESET
Not required
If C/B pulled during the minute
following a Double Reset this may
lead to a “Degraded mode".
The FMGC may be reset.
Apply the following procedure:
- Pull C/B for 5 seconds,
- Wait 1 minute,
- Pull again C/B for 5 seconds.
Or Pull C/B for 12 minutes.
J43126AA 00
© THALES AVIONICS S.A.
AIRBUS A318/319/320/321
Summary of Contents for FMGS
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