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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 messages, and both GPWS lights come
on. The loudness and the repetition rate of the aural message increase, when the aircraft enters the
hard warning areas.
The mode is armed, when ILS1 receives a valid signal.
Pressing the PULL UP/GPWS pushbutton switch 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.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
GPWS - EGPWS FUNCTIONS
A330/A340 FLEET DSC-34-70-30 P 1/6
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 AuralWarning ND (Refer to
DSC-31-45 GENERAL) Local Warning
Warning TERRAIN AHEAD, PULL UP
Automatic ‐ terrain display(1)
‐ Solid red areas
‐ TERR AHEAD (red)
The PULL UP (red)
light comes on, on each
pilot’s instrument panel
Caution TERRAIN AHEAD
‐ Automatic terrain display(1)
‐ Solid yellow areas
‐ TERR AHEAD (amber)
The GPWS (amber)
light comes on, on each
pilot’s instrument panel
(1)When the TERR ON ND pushbutton is selected ON, and ARC or ROSE mode is selected, the terrain is displayed on
the ND. The terrain is displayed in various densities of green, yellow, red or magenta depending on the threat (Refer
to DSC-31-45 GENERAL , INDICATIONS ON ND). If an alert is generated (caution or warning) when TERR ON ND is
not selected, the terrain will be automatically displayed and the ON light of the TERR ON ND pushbutton will come on.
Note: 1. When TERR ON ND is selected, the weather radar display image is not displayed, even
if the weather radar is ON.
2. The relative height of the aircraft is computed by using the Captain’s baro setting. Thus,
the Terrain Awareness Display (TAD) does not protect against baro setting errors.
3. The TAD and Terrain Clearance Floor (TCF) functions operate using the FMS 1 position.
Thus, the system does not protect against an FMS 1 position error.
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 :
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
GPWS - EGPWS FUNCTIONS
A330/A340 FLEET DSC-34-70-30 P 2/6
FCOM 19 AUG 10
Alert Level AuralWarning ND (Refer to
DSC-31-45 GENERAL) Local Warning
TERRAIN AHEAD, PULL UP
‐ Automatic terrain
display(1)
‐ Solid red areas
‐ TERR AHEAD (red)
Warning
OBSTACLE
AHEAD PULL UP
‐ Automatic terrain
display(1)
‐ Solid red areas
‐ OBST AHEAD (red)
On each pilot's instrument
panel, the PULL UP
(red) light comes on.
TERRAIN AHEAD
‐ Automatic terrain display(1)
‐ Solid yellow areas
‐ TERR AHEAD (amber)
Caution
OBSTACLE AHEAD
‐ Automatic terrain display(1)
‐ Solid yellow areas
‐ OBST AHEAD (amber)
On each pilot's instrument
panel, the GPWS
( amber) light comes on
(1)When the TERR ON ND pushbutton is selected ON, and ARC or ROSE mode is selected, the terrain is displayed on
the ND. The terrain is displayed in various densities of green, yellow, red or magenta depending on the threat (Refer
to DSC-31-45 GENERAL , INDICATIONS ON ND). If an alert is generated (caution or warning) when TERR ON ND is
not selected, the terrain will be automatically displayed and the ON light of the TERR ON ND pushbutton will come on.
Note: 1. When TERR ON ND is selected, the weather radar display image is not displayed.
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 3(134)
