Terrain Inhibit Switch - Honeywell Bendix/King KMD 550 Pilot's Manual Addendum

The KMD 550/850 will display the following possible EGPWS pop up
messages:
Title
TERRAIN ALERT
TERRAIN ALERT
TERRAIN WARNING Obstacle ahead.
TERRAIN WARNING Terrain ahead.
If a pop up message is shown, then pushing the TERR function select
key will reselect the Terrain Page.

TERRAIN INHIBIT SWITCH

EGPWS requires the installation of a "Terrain Inhibit" switch as part of
the system installation, or enabling of the MODE power key for selecting
inhibit mode. When engaged by the pilot, this will inhibit all visual and
aural alerts and warnings associated with the EGPWS. Also, an external
annunciator lamp is illuminated and a message will be displayed indi-
cating "Warnings Inhibited". For most systems the terrain display remains
operational and will look similar to the following:
The purpose of Terrain Inhibit is to allow aircraft to operate without nui-
sance or unwanted warnings at airports that are not in the system data-
base. Examples might be private airports or those with runways shorter
than 2000 feet. Additionally, there may be some "VFR-only" airports
where unique terrain features are in close proximity to the runway, and
Terrain Inhibit may be used when operating in good VFR conditions.
Terrain Inhibit should be NOT engaged for normal operations.
Note that the Terrain Icon shows a yellow exclamation point and the
TAWS status shows TERR INHBT to indicate that warnings are inhibited.
Rev 3 Jun/2004
Text
Caution obstacle.
Caution terrain.
11
Color
Black text, yellow background
Black text, yellow background
White text, red background
White text, red background
KMD 550/850 Terrain Addendum