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When switching between “WX” and “TERR” on the MFD, the range remains the
same. However, when switching from “TERR” to “WX”, the range will move in steps
until it reaches the last range displayed when “WX” was active.
20 20
10 10
WIND
SHEAR
20 20
10 10
WIND
SHEAR
GX_16_069
WINDSHEAR
WINDSHEAR
WINDSHEAR
SIREN
INCREASING PERFORMANCE DECREASING PERFORMANCE
DECREASING
HEADWIND
(KNOT/SEC)
1000
3000 DOWNDRAFT (FEET/MIN)
INCREASING
HEADWIND
(KNOT/SEC)
6 4 2 0 0 2 4 6
3000 UPDRAFT (FEET/MIN)
“WINDSHEAR
WINDSHEAR”
WINDSHEAR CAUTION
LAMP
2000
1000
2000
RUNWAY
“WINDSHEAR”
WINDSHEAR”
WINDSHEAR”
““
MICROBURST
WINDSHEAR
CAUTION LAMP
P I LOT T R A I N I N G GU I D E
NAVIGATION
16-58 For Training Purposes Only
Sept 04
When a terrain threat is detected, an aural “CAUTION TERRAIN, CAUTION
TERRAIN” is generated and GND PROX is annunciated on the PFD. When alerts are
activated, areas which meet the terrain threat, alert criteria are depicted yellow.
When a collision with terrain is predicted, an aural “TERRAIN, TERRAIN, PULL UP,
PULL UP” warning is generated and PULL UP is annunciated on the PFD. When
warnings are activated, areas which meet the terrain collision alert criteria are depicted
red. Terrain will automatically pop up, in MAP mode, on MFD at a 10 NM range, if
there is a terrain warning at 30 seconds from impact.
20 20
10 10
GND
PROX
GX_16_070
“CAUTION TERRAIN
CAUTION TERRAIN”
”
“
NOTE:
If in PLAN mode and auto pop-up occurs, MFD
format will automatically change to MAP mode,
with the terrain map displayed.
FLIGHT PATH ANGLE
CAUTION
Look Ahead
Distance
Caution
Altitude
Floor
“CAUTION TERRAIN”
Detection Area
360
N
5 5
3
6
33
30
TOC
GHJ
For Training Purposes Only
Sept 04
16-59
P I LOT T R A I N I N G GU I D E
NAVIGATION
ANNUNCIATIONS
All terrain annunciations are displayed on the MFD. The annunciations are as follows:
20 20
10 10
GX_16_071
PULL
UP
“TERRAIN, TERRAIN
PULL UP, PULL UP”
NOTE:
If in PLAN mode and auto pop-up occurs, MFD
format will automatically change to MAP mode,
with the terrain map displayed.
FLIGHT PATH ANGLE
WARNING
Look
Ahead
Distance
WARNING
Altitude
Floor
“TERRAIN, PULL UP”
Detection Area
360
N
5 5
3
6
30
TOC
GHJ
33
GX_16_072
SAT
GSPD
TERR
-56
TAT
TAS
-40
234
345
TOC KLM
DEF GHJ
4000 4000
FL180
TERR
TERR
TEST
TERR
FAIL
CNTRL
FAIL
TERR
N/A
TERR
INHIBIT
Terrain has been selected.
Indicates a self-test.
Internal failure or loss of communication
with EFIS
Indicates loss of range control for terrain map
Position uncertain
Terrain clearance floor, terrain awareness
alerting and display functions.
P I LOT T R A I N I N G GU I D E
NAVIGATION
16-60 For Training Purposes Only
Sept 04
TERRAIN CLEARANCE FLOOR (TCF)
The TCF function supplements the EGPWS function by providing an additional
terrain clearance alert envelope around airports. The TCF criteria is used to determine
alert and warning envelopes.
TCF creates an increasing terrain clearance envelope around the intended airport
runway directly related to the distance from the runway. TCF alerts are based on
current airplane location, nearest runway center point position and radio altitude,
along with an integral database that includes all worldwide, hard-surfaced runways
greater than 3500 feet in length.
Penetration of the alert envelope will generate an aural “TOO LOW TERRAIN” and a
GND PROX message is displayed on the PFD. The aural alert is repeated twice, and
again thereafter if the radio altitude value decreases by more than 20% from the
altitude at which the initial warning was issued. The EGPWS message remains
displayed until the airplane exits the alert envelope.
NOTE
In a case where landing at an airport that is not in the database,
all TERRAIN functions can be inhibited, by selecting the
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