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234
LX
345
0.05
WX
00:10
315
ET
GSPD
TAT
TAS
L
HDG
ETE
NM
KPHX
KSRP
4000
FL180
SAT
TOC
FMS1
N
5 5
KPHX
KSRP
30
33
3
6
TOC
1+36
KDVT
4000
KDVT
360
−40
−56
234
LX
345
0.05
WX
00:10
315
ET
GSPD
TAT
TAS
L
HDG
ETE
NM
KPHX
KSRP
4000
FL180
SAT
TOC
FMS1
N
5 5
KPHX
KSRP
30
33
3
6
NAVIGATION
REV 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
17−10−31
ENHANCED GROUND PROXIMITY WARNING SYSTEM (EGPWS)
The primary purpose of the EGPWS is to provide alerts and warnings to avoid controlled flight into
terrain and to provide detected windshear warning.
The EGPWS is categorized into 7 modes. The basic GPWS function is comprised of modes 1
through 6. The windshear function and the enhanced feature, terrain awareness alerting and display
function, are mode 7.
The Enhanced Ground Proximity Warning Computer (EGPWC) processes all inputs and provides all
aural and visual alerts and warnings. The following priority, from highest to lowest, is used to
determine which annunciation is displayed if more than one is active :
·
WIND
SHEAR
·
PULL
UP
·
GND
PROX
·
WIND
SHEAR
An alert annunciation indicates potential for impact with terrain. A warning annunciation indicates a
prediction for impact with terrain. All annunciations are displayed on pilot’s and copilot’s PFDs.
The MFD control panel provides for the selection of the Terrain display on the respective MFD.
For more information on the MFD Control Panel, see Chapters 3 and 11.
TERR BUTTON
Used to enable terrain display.
GF1710_058
The EGPWS control panel, located on the pedestal, provides for the selection of GS WARN
(MUTED), FLAP OVRD (OVRD) and TERRAIN (MUTED).
FLAP OVRD Switch
Used to mute flap aural warning when flaps
are not properly configured for landing.
GS WARN Switch
Used to mute glideslope warning.
TERRAIN Switch
Used to inhibit terrain clearance floor, terrain awareness alerting and display functions
(in a case where landing at an airport, that is not in the database).
GF1710_059
EGPWS
MUTED OVRD OFF
NAVIGATION
Flight Crew Operating Manual REV 41, Jul 08, 2004
CSP 700−6
Volume 2
17−10−32
EGPWS MODES
EGPWS modes are as follows:
Mode 1 − Excessive Descent rate
Mode 1 provides aural and visual alerts and warnings in the event that the EGPWC determines
that the rate of descent is excessive with respect to airplane altitude. The mode is active when the
airplane is less than 2500 ft AGL. Mode 1 requires radio altitude and rate of descent data.
The annunciation envelope consists of two areas: alert and warning.
· Penetration of the alert area will annunciate a GND PROX alert on the PFD and generate an
aural “SINKRATE, SINKRATE”. The aural alert will be annunciated once and will be
repeated only if condition degrades by more than 20% based on computed time to impact.
The visual alert will remain until the condition is rectified.
· Penetration of the warning area will annunciate a PULL UP alert on the PFD and generate
an aural “PULL UP” warning. The aural warning is annunciated continuously until the
condition is rectified.
PULL UP
SINKRATE
SINKRATE
PULL UP
GF1710_060
20
GND
PROX
10
PULL
UP
20
10
20
10
20
10
2500
2000
1500
1000
500
0
0
"SINKRATE"
"PULL UP "
RADIO ALTITUDE (FEET)
GF1710_061
2000 4000 6000 8000
DESCENT RATE (FEET/MINUTE)
"SINKRATE"
"PULL UP "
NAVIGATION
REV 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
17−10−33
EGPWS MODES (CONT'D)
Mode 2 − Excessive Terrain Closure Rate
Mode 2 provides alerts and warnings when the EGPWC detects that the closure rate between the
airplane and terrain is excessive. The airplane need not be in descent, rising terrain may be
encountered in level flight, or the terrain may be rising at a rate greater than the airplane rate of
　
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