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Honeywell EGPWS MK V Pilot's Manual page 47

Enhanced ground proximity warning system
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Table of Contents
Mark V and Mark VII EGPWS Pilot's Guide
Radio
Altitude
Continued
FMS, IRS,
AHRS
Global
Positioning
System
(GPS)
VHF Nav
Receiver
Terrain
Display
System
AOA Vane or
Stall Warning
Discretes
060-4241-000
Rev H, August 2011
This is only performed if TAD is enabled, high integrity
terrain and position data is available (based on GPS/
Geometric Altitude), and the Computed Terrain Clearance is
greater than 4000 feet (2500 feet with version -218-218 or
later). This feature reduces the potential for nuisance alerts
caused by false tracking of the Radio Altimeter.
Pitch and Roll Attitude, Latitude and Longitude Position,
Body Normal and Longitudinal Accelerations, Magnetic and
True Track Angles, Magnetic and True Heading, Inertial
Altitude, Groundspeed, and Attitude Mode.
Latitude and Longitude Position, True Track Angle, GPS
Altitude, Groundspeed, Horizontal and Vertical Figure of
Merit (VFOM/HFOM), Horizontal and Vertical Dilution of
Precision (HDOP/VDOP), Horizontal Integrity Limit (HIL),
and sensor status.
Note: Runway Awareness and Advisory System (RAAS),
Stabilized Approach Monitor, Takeoff Flap Configuration
Monitor, and Long Landing monitor functions require a GPS
source capable of providing Latitude (fine) and Longitude
(fine) data.
Glideslope, Localizer, ILS Tuned, Selected Runway Heading.
Display range, and if available the Hazard Bus from a
Predictive Windshear System (PWS). If EFIS, the EFIS
display mode is used in some configurations.
AOA, Stick Shaker Margin.
Discrete
inputs
signal/status input, and control input functions.
EGPWS program pins are utilized to tell the system the type
of aircraft and interface that it is in. These are defined and
established during the EGPWS installation. EGPWS output
functions are consequently the result of the program pin state
read each time the EGPWS is powered on.
Signal/status discretes include signals such as Decision
Height, Landing Flaps selected or Flap Position discretes,
Landing Gear selected, Terrain Display Range, and status
discretes such as Glideslope Valid, Localizer Valid, Radio
Altitude Valid associated with analog signal inputs.
Control discretes control EGPWS functions. These include
EGPWS Test, Glideslope Cancel, Glideslope Inhibit or
Glideslope Backcourse, Terrain (display) select, Terrain Inhibit,
Flap Override, Audio Inhibit, Altitude Callout Enable, Steep
Approach Enable, and ILS Tuned discretes.
are
used
for
system
configuration,
System Description
41

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