Section 8 Terrain Awareness Warning System
1
st
Ed Nov 2018
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
8-21
8.11.2. TAWS Manual Inhibit Functions
The pilot may select the following manual inhibit functions:
1)
Terrain Display
function may be inhibited using an EFIS soft menu
declutter control.
Figure 8-12: Terrain Display Functionality
2)
All TAWS
alerting functions (including popup functionality) are
inhibited with the external TAWS inhibit switch, which does not affect
the terrain display function, including FLTA warning (red) and caution
(amber [yellow]) flags on the ND.
3)
Low Altitude Mode Switch
may be actuated to inhibit or modify
parameters for alerting functions. This switch desensitizes HTAWS
when purposefully flying VFR at low altitudes with the following effects:
a) GPWS Mode 1 is inhibited.
b) GPWS Mode 2 is inhibited.
c) GPWS Mode 3 is inhibited.
4)
GPWS Mode 5
is inhibited with the glideslope cancel switch when
below 1000’ AGL. GPWS Mode 5 manual inhibit automatically resets
by ascending above 1000’ AGL.
8.12. TAWS Selections on PFD
Terrain and obstruction symbology for FLTA alerts meet the following
requirements:
1) Terrain cells that pierce the FLTA warning volume are colored red.
2) Terrain cells that pierce the FLTA caution volume are colored yellow.
