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900
800
700
600
500
400
300
200
100
0
0 100 200 300 400
COMPUTED AIRSPEED (KNOTS)
RUNWAY
GEAR DOWN
" TOO LOW TERRAIN " " TOO LOW FLAPS "
WARNING AREA
NAVIGATION
Flight Crew Operating Manual Rev 2A, Apr 11, 2005
CSP 700−5000−6
Volume 2
17−10−42
EGPWS MODES (CONT'D)
Mode 4 − Unsafe Terrain Clearance (Cont’d)
· Mode 4C is based on a minimum terrain clearance, or floor, that increases with radio altitude
during takeoff.
Any decrease in altitude below minimum terrain clearance will annunciate a
GND PROX message and generate an aural “TOO LOW TERRAIN” warning.
TOO LOW
TERRAIN
20
10
GF1710_072
GND
PROX
20
10
GF1710_073
0 400 800 1200 1600 2000 2400 2800
UNSAFE TERRAIN CLEARANCE
GEAR DOWN, FLAPS UP
1500 FPM CLIMB RATE
TAKEOFF
OVER FLAT TERRAIN
OR WATER
WARNING AREA (>250 KNOTS)
WARNING AREA
(<190 KNOTS)
RADIO ALTITUDE (FEET)
"TOO LOW TERRAIN"
"TOO LOW TERRAIN"
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
0
3000
MIN TERRAIN CLEARANCE (FEET)
NAVIGATION
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
17−10−43
EGPWS MODES (CONT'D)
Mode 5 − Descent Below Glideslope
Mode 5 provides alerts and warnings when the airplane descends below the glideslope on an ILS
approach. The alerts and warnings are annunciated in two distinct tones, depending on the
position of the airplane on the glideslope.
When the airplane descends more than 1.3 dots (but not more than 2 dots) below the glideslope, a
soft (6dB) aural “GLIDESLOPE” is generated. If the airplane continues to descend and deviates
more than 2 dots below the glideslope, an aural “GLIDESLOPE” warning is generated at the same
volume level as all other warnings. A GND PROX message is annunciated on the PFD. The aural
and visual alerts and warnings are continuously annunciated until the airplane exits the alert
envelope.
GLIDESLOPE
(SOFT)
GLIDESLOPE
NOTE
The "GLIDESLOPE" aural warning can be muted, using the GS WARN
switch on the engine control panel, located on the pedestal.
20
10
20
10
GF1710_074
GND
PROX
GND
PROX
20
10
20
10
MUTED
GF1710_075
MIN TERRAIN CLEARANCE (FEET)
GLIDESLOPE DEVIATION (DOTS FLY UP)
SOFT
"GLIDESLOPE"
HARD
"GLIDESLOPE"
0
1000
900
800
700
600
500
400
300
200
100
0 1 2 3 5
MODE 5 BELOW GLIDESLOPE ALERT
GEAR DOWN
RUNWAY
GLIDESLOPE
BEAM
CENTRE
HARD ALERT
SOFT ALERT AREA
AREA
HARD ALERT AREA
SOFT ALERT AREA
Mode 6 − Callouts
Mode 6 provides the following advisory alerts: transition through approach minimums, altitude
callouts on approach and excessive bank angles.
· Transition through the preset approach minimums, (APPROACHING DECISION HEIGHT or
APPROACHING MINIMUMS), generates an aural “MINIMUMS, MINIMUMS” warning. The
warning function is enabled between 1000 feet and 10 feet radio altitude for DH minimums
and when the corrected altitude exceeds the MDA value by 200 feet. The landing gear must
be down for activation of the warning.
NAVIGATION
Flight Crew Operating Manual Rev 2A, Apr 11, 2005
CSP 700−5000−6
Volume 2
17−10−44
EGPWS MODES (CONT'D)
Mode 6 − Callouts (Cont’d)
· An altitude callout function generates annunciation for descent below predetermined
altitudes. The aural “ONE HUNDRED”, “FIFTY” and “THIRTY” indicates the transition
through 100, 50 and 30 feet AGL. The last annunciated or transition altitude is memorized.
This will prevent the repeat annunciation of a callout, should the airplane transition through
said altitudes again. The memory is cleared and reset, once the airplane climbs to an
altitude greater than 1000 feet, or in the event a transition occurs from approach mode to
takeoff
mode.
A “smart altitude callout” provides an aural “FIVE HUNDRED” at 500 feet radio altitude
during a nonprecision
approach. The callout is generated during a precision approach if the
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