FMS DEGRADED OPERATION
FMGC RESETS or FAILURES
1
Chapter 2 - FMGC RESETS AND FAILURES
An automatic FMGC reset corresponds to an interruption of the
operational software processing.
A reset may be single or multiple.
A reset is always followed by a resynchronization with the other FMS.
When FM is failed, FMGC is unavailable; FM and FG are lost.
2.1. Automatic Single Reset of one FMGC
INDICATIONS IN THE COCKPIT
On ECAM
− If AP disconnects: Red warning AUTO FLT AP OFF and aural warning.
− If A/THR disconnects: Amber caution AUTO FLT A/THR OFF and aural
warning.
On the affected side:
ND: RANGE CHANGE
message (green),
followed by red flag MAP
NOT AVAIL is displayed.
The SET OFFSIDE
RNG/MODE message
(amber) is displayed if t
two ND ranges or mod
selected on the EFIS
control panels are
different.
he
es
Navaids auto-tuning is
momentarily lost.
AP: If engaged, the
onside AP & A/THR may
disconnect and managed
modes revert to selected
modes (HDG-V/S or
TRK/FPA). Use the other
AP as necessary.
FMA: Indicates auto-
systems degradation.
MAP NOT AVAIL
SET OFFSIDE RNG/MODE
RANGE CHANGE
AIRBUS A318/319/320/321
© THALES AVIONICS S.A.
J43126AA 00
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