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PITCH LIMIT INDICATOR
WIND
SHEAR
WIND
SHEAR
20
10
20
10
Windshear escape guidance is designed to allow the airplane to accelerate through the windshear
where airplane performance permits. Where airplane performance does not permit, the WSHR
mode will prevent the airplane from descending. The WSHR mode will command a descent if the
airplane approaches the stall warning point, to prevent the airplane from stalling.
For an increasing performance windshear, guidance will be given to maintain a slightly positive
flight path angle (1.5 degrees) until airspeed (CAS) reaches 20 knots above the CAS recorded
when the windshear mode was set. Guidance is then provided to climb the airplane at that speed.
NAVIGATION
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
17−10−47
EGPWS MODES (CONT'D)
Windshear Escape Guidance (Cont’d)
For a decreasing performance windshear, guidance will be provided to maintain a slightly positive
flight path angle (1.5 degrees) until the AOA increases to within 2 degrees of stick shaker firing
angle. The airplane will then be allowed to descend maintaining this margin to shaker. Between
400 and 10 feet (RAD ALT) margin to stick shaker will be reduced linearly to provide guidance at
stick shaker AOA.
Terrain Awareness Alerting
The terrain alerting function computes minimum terrain clearance envelopes for areas along the
flightpath of the airplane. The function uses airspeed and flightpath angle data in conjunction with
a database containing worldwide topographical relief information in grid format. The database
does not account for manmade
obstructions except for all known manmade
obstacles in Canada
and the United States.
The terrain display is available by pressing “TERR” button on the MFD control panel. Terrain within
2000 feet of the airplane altitude is displayed. Terrain will automatically pop up, in MAP mode, on
the MFD at a 10NM range, if there is a terrain threat caution at 60 seconds from impact.
GF1710_082
TERR Button
Selecting TERR button enables terrain displays,
(MAP mode only). Automatically deselects WX
radar (if selected). Selecting TERR button again
will reenable
WX radar (if previously selected).
NAVIGATION
Flight Crew Operating Manual Rev 2A, Apr 11, 2005
CSP 700−5000−6
Volume 2
17−10−48
EGPWS MODES (CONT'D)
Terrain Awareness Alerting (Cont’d)
When a terrain threat is detected, a “CAUTION TERRAIN, CAUTION TERRAIN” aural is
generated and GND PROX is annunciated on the PFD. When an obstacle threat is detected, a
“CAUTION OBSTACLE, CAUTION OBSTACLE” aural 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.
GF1710_083
20
10 GND
PROX
20
10
NOTE
If in PLAN mode and auto pop−up occurs,
MFD format will automatically change to
CAUTION TERRAIN
CAUTION TERRAIN
CAUTION
OBSTACLE,
CAUTION
OBSTACLE
MAP mode, with the terrain map displayed.
315
360 FMS1
30
6
HDG
N
50 50
3
33
KDVT
KPHX
3
TOC
KSRP
GF1710_084
CAUTION ALTITUDE
FLOOR
"CAUTION TERRAIN"
DETECTION AREA
CAUTION
LOOK AHEAD
DISTANCE
FLIGHT PATH ANGLE
NAVIGATION
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
17−10−49
EGPWS MODES (CONT'D)
Terrain Awareness Alerting (Cont’d)
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 a collision with an obstacle
is predicted, an aural “OBSTACLE, OBSTACLE, 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 10NM range, if there is a terrain warning at 30 seconds from impact.
GF1710_085
20
10 PULL
UP
20
10
NOTE
If in PLAN mode and auto pop−up occurs,
MFD format will automatically change to
TERRAIN, TERRAIN
PULL UP, PULL UP
OBSTACLE, OBSTACLE
MAP mode, with the terrain map displayed.
PULL UP, PULL UP
315
360 FMS1
30
6
HDG
N
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