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t
R
a
t
e
(
F
E
E
T
/
M
I
N
U
T
E
)
3000
2500
2000
1500
1000
500
0
2000 4000 6000 8000 1000
"SINKRATE"
"PULL UP!"
0
"SINKRATE"
"PULLUP"
"SINKRATE SINKRATE"
"PULL UP"
Glideslope
Deviation
Bias
060-4241-000 • Rev. E - December 2003
MK V & MK VII EGPWS Pilot Guide 9
If the Aural Declutter feature is disabled, the sinkrate alert
boundary remains fixed and the aural message “SINKRATE”
repeats continuously until the outer boundary is exited.
The EGPWS offers a Steep Approach option for given aircraft
types (typically bizjets) that desensitizes the alert boundaries
to permit steeper than normal approaches without unwanted
alerts.
Mode 2 provides alerts to help protect the aircraft from
impacting the ground when rapidly rising terrain with respect
to the aircraft is detected. Mode 2 is based on Radio Altitude
and on how rapidly Radio Altitude is decreasing (closure rate).
Mode 2 exists in two forms, 2A and 2B.
Mode 2A is active during climbout, cruise, and initial approach
(flaps not in the landing configuration and the aircraft not on
glideslope centerline). If the aircraft penetrates the Mode 2A
caution envelope, the aural message “TERRAIN, TERRAIN” is
generated and cockpit EGPWS caution lights will illuminate. If
the aircraft continues to penetrate the envelope, the EGPWS
warning lights will illuminate and the aural warning message
“PULL UP” is repeated continuously until the warning
envelope is exited.
Note: “Pull Up” may be preceded by “Whoop, Whoop” in some
configurations based on the audio menu option selected.
Upon exiting the warning envelope, if terrain clearance
continues to decrease, the aural message “TERRAIN” will be
given until the terrain clearance stops decreasing. In addition,
the visual alert will remain on until the aircraft has gained 300
feet of barometric altitude, 45 seconds has elapsed, or landing
flaps or the flap override switch is activated.
MODE 1
Continued
MODE 2
Excessive
Closure to
Terrain
MODE 2A
Steep
Approach
Bias
060-4241-000 • Rev. E - December 2003
10 MK V & MK VII EGPWS Pilot Guide
The graph below shows how the upper boundary of the Mode
2 alert envelope varies as a function of the aircraft speed. As
airspeed increases from 220 knots to 310 knots, the boundary
expands to provide increased alert times at higher airspeeds.
MODE 2A
Continued
With version -210-210 and later models, the Mode 2A upper
limit is reduced to 1250 feet (950 feet with version -218-
218 and later) for all airspeeds when the Terrain Alerting
and Display (TAD) function is enabled and available. This is
due to the enhanced alerting capability provided with TAD,
resulting from high integrity GPS Altitude and Geometric
Altitude data. The Mode 2A envelope is lowered in order to
reduce the potential for nuisance alerts during an approach.
060-4241-000 • Rev. E - December 2003
MK V & MK VII EGPWS Pilot Guide 11
Mode 2B provides a desensitized alerting envelope to permit
normal landing approach maneuvers close to terrain without
unwanted alerts. Mode 2B is automatically selected with flaps
in the landing configuration (landing flaps or flap over-ride
selected) or when making an ILS approach with Glideslope
and Localizer deviation less than 2 dots. It is also active during
the first 60 seconds after takeoff.
With version -210-210 and later models, Mode 2B is selected
when the aircraft is within 5nm (10nm with version -218-
218 and later) and 3500 feet of the destination airport
(independent of configuration) and the Terrain Alerting and
Display (TAD) function is enabled and available. This is due
to the enhanced alerting capability provided with TAD,
resulting from high integrity GPS Altitude and Geometric
Altitude data. The Mode 2B envelope is selected in order to
reduce the potential for nuisance alerts during an approach.
MODE 2B
The graph above shows the Mode 2B envelope.
060-4241-000 • Rev. E - December 2003
12 MK V & MK VII EGPWS Pilot Guide
MODE 3
Altitude
Loss After
TakeOff
During an approach, if the aircraft penetrates the Mode 2B
envelope with either the gear or flaps not in the landing
configuration, the aural message “TERRAIN, TERRAIN” is
　
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