Thales FMGS - Switching Conditions

FLIGHT PHASES
DESCENT 3
6.1. SWITCHING CONDITIONS
The FMGS switches automatically from
CRUISE to DESCENT phase when:
− Reaching TOP of DESCENT (T/D) as
computed in ACTIVE F-PLN, or,
− A lower ALT is selected on FCU at less
than 200 NM to DEST (Early Descent),
or,
− ALT selected on FCU is at or below the
higher of FL 200 or highest DES ALT
CSTR.
FMA
MACH NAV
MDA 278
AP1
1FD2
A/THR
DES
ALT
DES
ALT
AP1
1FD2
A/THR MDA 278
NAV THR IDL
E
− MACH is displayed in case of
early descent, or when F
does not immediately
command idle thrust;
otherwise THR IDLE is
displayed,
MGS
− DES if managed mode is
engaged, OP DES or V/S if
selected mode is engaged.
See below
MCDU:
PERF page title becomes DES green,
PROG page title becomes DESCENT green.
OP DES
ALT
AP1
1FD2
A/THR
MDA 278
NAV THR IDL
E
V/S -800 AP1
1FD2
A/THR
MDA 278
NAV MACH
PROG
DESCENT THV001
CRZ OPT REC MAX
----- ----- FL392
<REPORT
UPDATE AT
*[ ]
BRG /DIST
336° /157.2 TO EGLL27R
PREDICTIVE
<GPS GPS PRIMARY
CUR ESTIMATEDREQUIRED AC
2.0NM HIGH 0.08NM
DES
ACT MODE UTC DEST EFOB
MANAGED 2119 4.3
CI
30 PRED TO FL320
MANAGED UTC DIST
.79/293 2050 21
EXPEDITE 2047 6
ACTIVATE NEXT
{APPR PHASE PHASE>
PERF
PROG
CRUISE THV001
CRZ OPT REC MAX
FL360 FL364 FL392
<REPORT
UPDATE AT
*[ ]
IST BRG /D
336° /1 EGLL27R 57.2 TO
PREDICTIVE
<GPS GPS PRIMARY
REQUIRED ACCUR ESTIMATED
2.0NM GH 0.08NM HI
CRZ
ACT MODE UTC DEST EFOB
MANAGED 2118 3.9
CI
30 TO (T/D)
MANAGED UTC DIST
.79 2055 70
DES CABIN RATE
-350FT/MN
ACTIVATE NEXT
{APPR PHASE PHASE>
PERF
AIRBUS A318/319/320/321
© THALES AVIONICS S.A.
J43126AA 00