060-4314-000 • Rev. C - May 2004
22 MK VI & MK VIII EGPWS Pilot Guide
MODE 5
Continued
Excessive Deviation Below Glidescope
MODE 6
Advisory
Callouts
Additionally, both alert levels are desensitized below 150 feet
AGL, to allow for normal beam variations nearer the ground, and
reduce the possibility of nuisance alerts.
Mode 5 alerts can be
canceled by pressing the Glideslope Cancel switch (if installed,
usually part of the “Below Glideslope” or amber "GPWS"
annunciator) any time below 2000 feet AGL. This is auto-
matically reset when the aircraft descends below 30 feet or
climbs above 2000 feet AGL. The MK VI (only) can do this, by
changing the ILS frequency.
Note: Glideslope Cancel can not
be deselected (reset) by again pressing the Glideslope Cancel
switch.
EGPWS Mode 5 alerts may be inhibited during backcourse ap-
proaches to prevent nuisance alerts due to false fly up lobes from
the Glideslope. The EGPWS determines a backcourse approach if
a glideslope inhibit discrete is set.
Mode 6 provides EGPWS advisory callouts based on the menu
selected option established at installation. These callouts consist
of predefined Radio Altitude based altitude and excessive bank
angle voice callouts. There is no visual alerting provided with
these callouts.
Decision Height (DH) based callout (“Minimums - Minimums”)
require the landing gear to be down, and occur when descending
through the altitude corresponding to the selected DH. These
also have priority over other altitude callouts when overlapping.
For example, if DH is set to 200 and both “TWO HUNDRED”
and “MINIMUMS - MINIMUMS” are valid callouts, then only the
“MINIMUMS - MINIMUMS” will be issued at 200 feet AGL.
To Next Page
Loading...
Need help?
General
