Honeywell EGPWS MK V Pilot's Manual page 16

Enhanced ground proximity warning system
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M
4
ODE
A
Continued
M
4
ODE
B
16
aircraft is not descending excessively. It also provides alerting
for protection against an unintentional gear-up landing.
Below 1000 feet AGL and above 190 knots airspeed, the Mode
4A aural alert is "TOO LOW TERRAIN". This alert is
dependent on aircraft speed such that the alert threshold is
ramped between 500 feet at 190 knots to 1000 feet at 250
knots.
Below 500 feet AGL and less than 190 knots airspeed, the
Mode 4A aural alert is "TOO LOW GEAR".
For either Mode 4A alert, subsequent alert messages occur only
if penetration of the envelope increases by 20%. EGPWS
caution lights extinguish and aural messages cease when the
Mode 4A alert envelope is exited.
If the Aural Declutter feature is disabled, mode 4A alert
messages are repeated continuously until the Mode 4A
envelope is exited.
Mode 4B is active during cruise and approach, with gear down
and flaps not in the landing configuration.
Below 1000 feet AGL and above 159 knots airspeed, the Mode
4B aural alert is "TOO LOW TERRAIN". This alert is dependent
on aircraft speed such that the alert threshold is ramped be-
060-4241-000 • Rev. D - March 2000
MK V & MK VII EGPWS Pilot Guide

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