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AGL, to allow for normal beam variations nearer the ground,
and reduce the possibility of nuisance alerts.
If the Aural Declutter feature is disabled, messages are repeated
continuously until the Mode 5 envelope is exited.
Mode 5 alerts can be canceled by pressing the Glideslope
Cancel switch (if installed). The EGPWS will interpret this
switch one of two ways depending on the installation
configuration.
• A standard glideslope cancel switch allows for manually
canceling Mode 5 alerting any time below 2000 feet AGL.
This is automatically reset when the aircraft descends below
30 feet or climbs above 2000 feet AGL (1000 feet AGL for
current Boeing production aircraft).
• An alternate glideslope cancel switch allows for manually
canceling Mode 5 alerting at any time and any altitude. The
cancel is reset by again pressing the cancel switch, or
automatically if gear or flaps are raised, or the aircraft is on
the ground. Due to the nature of the alternate cancel
switch, this method requires that there be a cockpit
annunciation that glideslope cancel is in effect (this configuration
is currently not allowed on aircraft operating
under FAA part 121 rules).
EGPWS Mode 5 alerts are inhibited during backcourse
approaches to prevent nuisance alerts due to false fly up lobes
from the Glideslope. The EGPWC determines a backcourse
approach if either: 1) the aircraft’s magnetic track is greater
than 90 degrees from the runways approach course, or 2) a
glideslope inhibit discrete is set.
MODE 5
Continued
060-4241-000 • Rev. E - December 2003
MK V & MK VII EGPWS Pilot Guide 19
Mode 6 provides EGPWS advisory callouts based on the
menu-selected option established at installation (set by
program pin configuration). These callouts consist of
predefined Radio Altitude based voice callouts or tones and an
excessive bank angle warning. There is no visual alerting
provided with these callouts.
The following is a list of each of the possible altitude callouts
or tones:
CALLOUT Occurs at (feet AGL)
“RADIO ALTIMETER” ....................................................... 2500
“TWENTY FIVE HUNDRED” .............................................. 2500
“ONE THOUSAND” .........................................................1000 a
“FIVE HUNDRED” ........................................................... 500 a
Five Hundred Tone (2 second 960 Hz) ............................... 500
“FOUR HUNDRED” ............................................................ 400
“THREE HUNDRED” .......................................................... 300
“TWO HUNDRED” ............................................................. 200
“APPROACHING MINIMUMS” ...................................... DH+80 b
“APPROACHING DECISION HEIGHT” ......................... DH+100 b
“PLUS HUNDRED” .................................................... DH+100 b
“FIFTY ABOVE” .......................................................... DH+50 b
“MINIMUMS” ................................................................... DH b
“MINIMUMS - MINIMUMS” .............................................. DH b
“DECISION HEIGHT” ....................................................... DH b
“DECIDE” ....................................................................... DH b
“ONE HUNDRED” .............................................................. 100
One Hundred Tone (2 second 700 Hz) ............................... 100
“EIGHTY” ........................................................................... 80
“SIXTY” .............................................................................. 60
“FIFTY” .............................................................................. 50
“FORTY” ............................................................................. 40
“THIRTY FIVE” .................................................................... 35
Thirty Five Tone (1 second 1400 Hz) .................................... 35
“THIRTY” ........................................................................... 30
“TWENTY” .......................................................................... 20
Twenty Tone (1/2 second 2800 Hz) ...................................... 20
“TEN” ................................................................................. 10
“FIVE” .................................................................................. 5
　
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