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set to AUTO.
Depending on the windshear alert level, ND indication may be completed with a PFD message
(Refer to DSC-31-40 FLAGS AND MESSAGES DISPLAYED ON PFD).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INDICATING / RECORDING SYSTEMS
INDICATIONS ON ND
A318/A319/A320/A321 FLEET DSC-31-45 P 49/72
FCOM 19 AUG 10
EGPWS
Applicable to:
(1) EGPWS terrain picture
The ND displays the EGPWS terrain picture, when the TERR ON ND switch is selected ON,
and the ND is not in PLAN mode. The terrain picture replaces the weather radar image. Terrain
data is displayed independently of the aircraft relative altitude.
The terrain appears in different colors and densities, in accordance with its relative height :
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INDICATING / RECORDING SYSTEMS
INDICATIONS ON ND
A318/A319/A320/A321 FLEET DSC-31-45 P 50/72
FCOM 19 AUG 10
Note: Areas without available terrain data in the EGPWS ‐ database appear in magenta.
‐ The reference altitude is computed based on the current aircraft altitude or, if
descending more than 1 000 ft/min, the altitude expected in 30 s.
‐ In case of flight above the maximum elevation number, the relief between the
minimum and maximum displayed elevations is displayed by using three different
green levels.
(2) Center Part Messages
The “TERR CHANGE MODE” indication is displayed in red ‐ (or amber), in the case of a
Terrain Awareness Display (TAD) warning (or caution) alert, if the current selected display
mode is PLAN.
‐ The “TERR REDUCE RANGE” indication is displayed in red (or amber), in the case of a
Terrain Awareness Display (TAD) warning (or caution) alert, if the selected range is 160 nm
or 320 nm.
(3) TERR indication
To differentiate between the terrain and the weather display, the weather radar TILT is replaced
by a blue TERR, and the terrain display sweeps from the center outward to both ND sides.
(4) Warning and caution messages
TERR AHEAD
(amber)
: For a terrain or obstacle caution.
TERR AHEAD
(red)
: For a terrain or obstacle warning.
When triggered, these messages flash for 9 s, then remain steady until the caution or warning
alert condition disappears.
TERR RNG (red) : For a RANGE error warning.
TERR TST
(amber)
: Appears during the EGPWS test, when the terrain pattern is displayed,
and there is no failure.
(5) Terrain or obstacle caution alert
Generated when a conflict exists between the terrain caution envelope, ahead of the aircraft,
and database-stored terrain/obstacles. The conflict area is shown in solid yellow.
(6) Terrain or obstacle warning alert
Generated when a conflict exists between the terrain warning envelope, ahead of the aircraft,
and terrain/obstacles data stored in the database. The conflict area is shown in solid red.
Note: When an alert is generated (either caution or warning) and TERR ON ND is not
selected, the terrain is automatically displayed and the TERR ON ND’s pushbutton
ON light comes on.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INDICATING / RECORDING SYSTEMS
INDICATIONS ON ND
A318/A319/A320/A321 FLEET DSC-31-45 P 51/72
FCOM 19 AUG 10
(7) Highest Elevation
The highest elevation encountered within the selected range is only displayed in ARC mode, in
the top righthand corner of the terrain frame, using the color code of paragraph 1.
EGPWS
Applicable to:
(1) EGPWS terrain picture
The ND displays the EGPWS terrain picture, when the TERR ON ND switch is selected ON,
and the ND is not in PLAN mode. The terrain picture replaces the weather radar image. Terrain
data is displayed independently of the aircraft relative altitude.
The terrain appears in different colors and densities, in accordance with its relative height :
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INDICATING / RECORDING SYSTEMS
INDICATIONS ON ND
A318/A319/A320/A321 FLEET DSC-31-45 P 52/72
FCOM 19 AUG 10
Note: Areas without available terrain data ‐ in the EGPWS database appear in magenta.
‐ The reference altitude is computed based on the current aircraft altitude or, if
descending more than 1 000 ft/min, the altitude expected in 30 s.
‐ In case of flight above the maximum elevation number, the relief between the
minimum and maximum displayed elevations is displayed by using three different
green levels.
(2) Center Part Messages
‐ The “TERR CHANGE MODE” indication is displayed in red (or amber), in the case of a
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A320机组操作手册FLIGHT CREW OPERATING MANUAL 3(132)
