12
FLIGHT PHASES
APPROACH
J43126AA 00
© THALES AVIONICS S.A.
AIRBUS A318/319/320/321
Trajectory deviation symbol
A/C with GPS
The trajectory deviation from the
theoretical vertical profile computed by
the FMGC is displayed in the following
conditions:
−
NAV mode engaged or HDG mode with
XTK lower than 4NM, and,
−
FMGC in APPROACH or GO AROUND
phase, and,
−
A NPA (e.g. VOR, GPS, NDB) is
selected in ACTIVE F-PLN.
VDEV is shown:
−
On MCDU PROG page in field [2R].
If conditions not met for display the
field is blank,
−
On PFD by a magenta rectangle.
The range is ± 200 ft; each
graduation represents 100 ft.
If VDEV is greater ± 200 ft, symbol
stays at the range limit and the PROG
page displays the exact value.
If conditions not met for display the
symbol is not shown.
If the LS pushbutton is pressed, glide
deviation has priority over vertical
deviation information; an amber V/DEV message flashes above the
glide scale.
MCDU and PFD information remain displayed until the MDA has been
reached, or the MAP, or the
runway has been sequenced.
A/C without GPS
Trajectory deviation is
displayed when APPR mode is
armed or engaged.
Otherwise vertical deviation
(magenta circle) is displayed
with logics described above.
APPR
SPEED
HDG
APP NAV
AP1
1FD2
A/THR
ALT
FINAL
SPEED
APP NAV
AP1
1FD2
A/THR
ALT
FINAL
SPEED
APP
AP1
1FD2
A/THR
FINAL
APPROACH
THV001
CRZ OPT REC MAX
----- -----
FL393
<REPORT
VDEV=
+
0
FT
UPDATE AT
*[ ]
BRG /DIST
166°
/
18.2
TO
EGLL27R
PREDICTIVE
<GPS
GPS PRIMARY
REQUIRED ACCUR ESTIMATED
0.50
NM
HIGH
0.08NM
Summary of Contents for FMGS
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