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alert sounds repeatedly.
The lower cut-off limit is 10 ft radio altitude.
Mode 3 is desensitized in accordance with the time accumulated after departure and the radio
altitude.
MODE 4 : UNSAFE TERRAIN CLEARANCE WHEN NOT IN LANDING CONFIGURATION
Applicable to:
4A — LANDING GEAR UP.
Two aural warnings may be triggered, depending on the area : “TOO LOW-GEAR” or “TOO
LOW-TERRAIN”.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
GPWS - GPWS BASICS MODES
A318/A319/A320/A321 FLEET DSC-34-70-20 P 6/10
FCOM 19 AUG 10
4B — LANDING GEAR DOWN, AND FLAPS NOT IN LANDING CONFIGURATION.
Three aural warnings may be generated, depending on the area and configuration : “TOO
LOW-GEAR”, “TOO LOW-FLAPS” or “TOO LOW-TERRAIN”.
4C — LANDING GEAR UP, OR FLAPS NOT IN LANDING CONFIGURATION.
If the aircraft starts an inadvertant controlled flight into the ground, during takeoff and climb, and
penetrates the boundary, then the GPWS lights come on, and the “TOO LOW TERRAIN” aural
alert sounds repeatedly.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
GPWS - GPWS BASICS MODES
A318/A319/A320/A321 FLEET DSC-34-70-20 P 7/10
FCOM 19 AUG 10
MODE 4 : UNSAFE TERRAIN CLEARANCE WHEN NOT IN LANDING CONFIGURATION
Applicable to:
,
,
MSN,,,,
4A — LANDING GEAR UP.
Two aural warnings may be triggered, depending on the area : “TOO LOW-GEAR” or “TOO
LOW-TERRAIN”.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
GPWS - GPWS BASICS MODES
A318/A319/A320/A321 FLEET DSC-34-70-20 P 8/10
FCOM 19 AUG 10
4B — LANDING GEAR DOWN, AND FLAPS NOT IN LANDING CONFIGURATION.
Three aural warnings may be generated, depending on the area and configuration : “TOO
LOW-GEAR”, “TOO LOW-FLAPS” or “TOO LOW-TERRAIN”.
If the enhanced GPWS functions and the geometric altitude are of high integrity, the upper
operational limit is reduced to 500 ft. If not, it is only reduced to 800 ft when an overflight is
detected.
4C — LANDING GEAR UP, OR FLAPS NOT IN LANDING CONFIGURATION.
If the aircraft starts an inadvertant controlled flight into the ground, during takeoff and climb, and
penetrates the boundary, then the GPWS lights come on, and the “TOO LOW TERRAIN” aural
alert sounds repeatedly.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
GPWS - GPWS BASICS MODES
A318/A319/A320/A321 FLEET DSC-34-70-20 P 9/10
FCOM 19 AUG 10
MODE 5 : DESCENT BELOW GLIDESLOPE
Applicable to: ALL
Note: Normally, the glideslope alert is only triggered with the gear down. For a few airports, the
gear down logic requirement is deleted and other upper limits are used to increase the
warning envelope.
In both areas, the alert is a repeated “GLIDESLOPE” aural message.
The loudness of the aural message increases, when the aircraft enters the hard warning areas.
The mode is armed, when ILS 1 receives a valid signal.
Pressing the GPWS pushbutton cancels the warning. This is temporary and the mode is
automatically reactivated for a new alert.
The upper cut-off limit is 1 000 ft radio altitude.
The lower cut-off limit is 30 ft radio altitude.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
GPWS - GPWS BASICS MODES
Intentionally left blank
A318/A319/A320/A321 FLEET DSC-34-70-20 P 10/10
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
GPWS - EGPWS FUNCTIONS
A318/A319/A320/A321 FLEET DSC-34-70-30 P 1/8
FCOM 19 AUG 10
TERRAIN AWARENESS AND DISPLAY
Applicable to:
The Terrain Awareness and Display (TAD) function computes a caution and a warning envelope in
front of the aircraft, which varies according to aircraft altitude, nearest runway altitude, distance to
the nearest runway threshold, ground speed, and turn rate. When the boundary of these envelopes
conflicts with the terrain memorized in the database, the system generates the relevant alert :
Alert Level Aural Warning
ND Refer to DSC-31-45
FLAGS AND MESSAGES
DISPLAYED ON ND
Local Warning
Warning TERRAIN
AHEAD, PULL UP
‐ Automatic terrain
displaySee *
‐ Solid red areas
‐ TERR AHEAD (red)
Caution TERRAIN AHEAD
‐ Automatic terrain display
pop up See *
‐ Solid yellow areas
　
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