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climb. Mode 2 uses radio altitude and vertical speed inputs.
PULL UP
TERRAIN
TERRAIN
PULL UP
GF1710_062
20
GND
PROX
10
PULL
UP
20
10
20
10
20
10
2500
2000
1500
1000
500
"TERRAIN
TERRAIN" "PULL UP"
TERRAIN CLOSURE RATE(FEET/MIN)
RADIO ALTITUDE (FEET)
GF1710_063
6000 8000
TER RAIN" " TER RAIN"
0
0 2000 4000 10000
"PULL UP"
Mode 2 has two submodes:
Mode 2A and Mode 2B.
· Mode 2A − Activated when flaps are not in the landing position. Penetration of the alert area
will annunciate a GND PROX on the PFD and generate an aural “TERRAIN,TERRAIN”. The
aural is annunciated once and 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 and visual warning are annunciated continuously
until the condition is rectified.
NAVIGATION
Flight Crew Operating Manual REV 41, Jul 08, 2004
CSP 700−6
Volume 2
17−10−34
EGPWS MODES (CONT'D)
Mode 2 − Excessive Terrain Closure Rate (Cont’d)
· Mode 2B − Activated when flaps are in the landing configuration, or in the event the flaps are
up and the airplane is on an ILS approach and the glideslope and localizer deviations are
less than ±2 dots and for 60 seconds after takeoff.
Penetration of the alert area will
annunciate a GND PROX on the PFD and enable an aural “TERRAIN,TERRAIN”. The aural
and the visual alerts are annunciated continuously and 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 and visual warning are annunciated
continuously until the condition is rectified. The Mode 2B warning envelope is inhibited at an
altitude below 30 feet AGL.
PULL UP
TERRAIN
TERRAIN
PULL UP
GF1710_064 20
GND
PROX
10
PULL
UP
20
10
20
10
20
10
"TERRAIN
TERRAIN" "PULL UP"
2500
2000
1500
1000
500
0
0 2000
RADIO ALTITUDE (FEET)
TERRAIN CLOSURE RATE(FEET/MIN)
GF1710_065
4000 6000 8000 10000
" PULL UP "
" TERRAIN " " TERRAIN "
NAVIGATION
REV 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
17−10−35
EGPWS MODES (CONT'D)
Mode 3 − Altitude Loss After Takeoff
Mode 3 provides warnings when the EGPWC detects that a significant amount of altitude is lost
immediately after takeoff
or during a goaround.
Mode 3 uses radio altitude, barometric altitude
and altitude rate.
If a descent is initiated following takeoff
or goaround,
the EGPWC stores the altitude value at
which the descent began and compares successive altitude data to the stored value. Activation of
the warning is induced when the minimum terrain clearance, as a function of altitude lost, is
exceeded.
Penetration of the alert area will annunciate a GND PROX alert on the PFD and generate an aural
“DONT SINK, DONT SINK” warning. The aural warning is annunciated only once, unless the
altitude value degrades by more than 20% from the initially stored value and again at each
additional 20% degradation from the initially stored value. This condition will remain until the
airplane regains the initial altitude value. Mode 3 is inhibited for radio altitude values in excess of
1500 feet.
DON’T SINK
DON’T SINK
20
10
GF1710_066
GND
PROX
20
10
500
1000
1500
2000
2500
RADIO ALTITUDE (FEET)
ALTITUDE LOSS (FEET)
0 200 400 800
0
"DON’T SINK"
GF1710_067
" DON’T SINK "
NAVIGATION
Flight Crew Operating Manual REV 41, Jul 08, 2004
CSP 700−6
Volume 2
17−10−36
EGPWS MODES (CONT'D)
Mode 4 − Unsafe Terrain Clearance
Mode 4 provides alerts and warnings for insufficient terrain clearance based on airplane phase of
flight and airspeed. Mode 4 requires radio altitude, computed airspeed, gear position and flap
position inputs. The alert and warning envelopes are based on minimum allowable terrain
clearance as a function of computed airspeed.
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