Honeywell MK VI Manual
060-4314-000 • Rev. C - May 2004
MK VI & MK VIII EGPWS Pilot Guide
MK VI and MK VIII
Enhanced Ground Proximity Warning System (EGPWS)
Pilot's Guide
This document is an unpublished work
Copyright 2004
Honeywell International Inc.
All rights reserved
This document and all information and expression contained herein
are the property of Honeywell International Inc. Your use of this
document is strictly limited to a legitimate business purpose requir-
ing the information contained therein. Your use of this document
constitutes acceptance of these terms.
060-4314-000 • Rev. C - May 2004
MK VI & MK VIII EGPWS Pilot Guide 3
TABLE OF CONTENTS
SECTION 1 Introduction ..............................................................................................4
SECTION 2 System Description ...................................................................................7
SECTION 3 Operational Procedures ..........................................................................46
SECTION 4 Definitions ..............................................................................................56
Request for Information .............................................................................................58
060-4314-000 • Rev. C - May 2004
4 MK VI & MK VIII EGPWS Pilot Guide
This Pilot Guide describes the functions and operation of the
MK VI and MK VIII Enhanced Ground Proximity Warning System
(EGPWS).
This document is divided into four sections. Section 1 is this
introduction and the following brief description of the EGPWS
and its features. Section 2 provides a functional description of
the EGPWS. This includes descriptions of the various system
modes, Built In Test (BIT) and monitoring functions, and system
features. Section 3 provides general operating procedures to fol-
low when the system gives a caution or warning alert. Section 4
provides definitions of terms used in this manual.
This guide does not supercede FAA approved data, Flight
Manuals, individual Operations Manuals, requirements,
or procedures. Pilots should be thoroughly familiar
with their own company policies, system configuration,
requirements, and procedures with respect to the op-
eration of aircraft with the EGPWS.
The information in this document is intended as a general expla-
nation of the Honeywell MK VI & MK VIII EGPWS. It contains a
general description of system performance assuming identified
options are active, and highlights deviations in system perfor-
mance resulting when a feature is disabled.
The EGPWS is a Terrain Awareness and Warning System (TAWS)
providing basic GPWS functions plus additional enhanced terrain
alerting and display features.
The EGPWS uses aircraft inputs including geographic position, at-
titude, altitude, airspeed, and glideslope deviation. These are used
with respect to internal terrain, obstacle, and airport databases
to predict a potential conflict between the aircraft flight path and
terrain or an obstacle. A conflict will result in the EGPWS provid-
ing a visual and audio caution or warning alert.
Additionally, the EGPWS provides alerts for excessive glideslope
deviation, too low with flaps or gear not in landing configuration,
and optionally provides bank angle and altitude callouts based on
system configuration selection.
SECTION 1
Introduction
What is the
EGPWS?
5
060-4314-000 • Rev. C - May 2004
MK VI & MK VIII EGPWS Pilot Guide
The EGPWS incorporates several “enhanced” features:
• Terrain Alerting and Display (TAD) function provides a
graphic display of the surrounding terrain on the Weather
Radar Indicator, EFIS, or a dedicated display. Based on the
aircraft’s GPS position and the internal database, the terrain
topography (within the display range selected) that is above
or within 2000 feet below the aircraft altitude is presented
on the system display. This feature is an option, enabled by
system configuration selection during installation.
• “Peaks” function is a TAD supplemental feature providing
additional terrain display features for enhanced situational
awareness, independent of the altitude of the aircraft. This
includes digital elevations for the highest and lowest dis-
played terrain, additional elevation (color) bands, and a
unique representation of sea level (0 feet MSL). This feature
is an option, enabled by system configuration selection dur-
ing installation for compatible display systems.
• “Obstacles” alerting function is a feature utilizing an
obstacle database for obstacle conflict alerting and display.
EGPWS visual and audio alerts are provided when a conflict
is detected. Additionally, when TAD is enabled, Obstacles
are graphically displayed similar to terrain. This feature is
an option, enabled by system configuration selection during
installation.
• A process feature called Envelope Modulation utilizes the
internal database to tailor EGPWS alerts at certain geographic
locations to reduce nuisance alerts and provide added pro-
tection.
Note: This feature is not available in the initial release
(-001) for the MK VI and MK VIII.
• A Terrain Clearance Floor (TCF) function adds an addi-
tional element of protection by alerting the pilot of possible
premature descent. This is intended for non-precision ap-
proach and is based on the current aircraft position relative
to the nearest runway in the database. This feature is en-
abled with the TAD function.
What is the
EGPWS?
continued
060-4314-000 • Rev. C - May 2004
6 MK VI & MK VIII EGPWS Pilot Guide
Physical
Description
• Similar to the TCF feature, a Runway Field Clearance Floor
(RFCF) feature provides alerting to the pilot of possible
premature descent based on the aircraft’s GPS position and
height above the destination runway using Geometric Alti-
tude. This provides improved protection at locations where
the destination runway is significantly higher than the sur-
rounding terrain.
• Geometric Altitude, based on GPS altitude, is a computed
pseudo-barometric altitude designed to reduce or elimi-
nate altitude errors resulting from temperature extremes,
non-standard pressure altitude conditions, flight in QFE en-
vironment, and altimeter miss-sets. This ensures an optimal
EGPWS alerting and display capability.
Some features are optional and may not be active in a given in-
stallation. For specific effectivity, refer to an applicable Airplane
Flight Manual (AFM) or EGPWS Airplane Flight Manual Supple-
ment (AFMS).
The MK VI/MK VIII EGPWS is packaged in a non-ARINC rack
mounted enclosure weighing less than 4 lbs. No special vibration
isolation or forced air-cooling is required.
Only 28 VDC versions of the EGPWS are available. Units are avail-
able with an internal GPS receiver for required GPS data when
another GPS source is not available.
For more detailed information, contact Honeywell.
7
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MK VI & MK VIII EGPWS Pilot Guide
SECTION 2
Enhanced Ground Proximity Warning System ..............................................................8
EGPWS Database ...........................................................................................................8
Basic Functions:
Mode 1 - Excessive Descent Rate ............................................................................... 10
Mode 2 - Excessive Closure to Terrain ....................................................................... 12
Mode 3 - Altitude Loss After Takeoff ............................................................................15
Mode 4 - Unsafe Terrain Clearance ............................................................................ 16
Mode 5 - Excessive Deviation Below Glideslope ....................................................... 21
Mode 6 - Advisory Callouts ........................................................................................ 22
Enhanced Functions:
Envelope Modulation ................................................................................................. 26
Terrain Clearance Floor ............................................................................................. 26
Runway Field Clearance Floor ....................................................................................28
Terrain Alerting and Display ........................................................................................29
Non-Peaks Display ......................................................................................................31
Pop-Up and Auto-Range .............................................................................................33
Peaks Display ..............................................................................................................33
TCF/TAD Inop and Inhibit ...........................................................................................38
Geometric Altitude ......................................................................................................38
Aural Message Priority ................................................................................................ 40
System Inputs ............................................................................................................41
System Outputs ..........................................................................................................43
Options .......................................................................................................................43
060-4314-000 • Rev. C - May 2004
8 MK VI & MK VIII EGPWS Pilot Guide
Enhanced
Ground
Proximity
Warning
System
EGPWS
Database
The EGPWS adds to these 6 basic functions the ability to compare
the aircraft position to an internal database and provide addi-
tional alerting and display capabilities for enhanced situational
awareness and safety (hence the term “Enhanced” GPWS).
The EGPWS internal database consists of four subsets:
• Terrain data of varying degrees of resolution.
• Cataloged obstacles 100 feet or greater in height located
within North America, portions of Europe and portions of Asia
(expanding as data is obtained).
• Airport runway data containing information on all runways
2000 feet or longer in length. This value is configurable as
3500 feet in the MK VIII in software load -008 or later. For a
specific list of the airports included, refer to Honeywell docu-
ment 060-4326-000, or 060-4267-000.
This can also be accessed on the Internet at www.egpws.com.
• An Envelope Modulation database to support the Envelope
Modulation feature described later. (This feature not available
in -001 release).
The MK VI EGPWS provides regional database coverage whereas
the MK VIII EGPWS provides a worldwide database . For the MK
VI, the database is divided into three regions referred to as the
Americas Region, Atlantic Region, and the Pacific Region.
The EGPWS incorporates the functions of the basic Ground
Proximity Warning System (GPWS). This includes the following
alerting modes:
9
060-4314-000 • Rev. C - May 2004
MK VI & MK VIII EGPWS Pilot Guide
EGPWS
Database
continued
Americas Region (4XXN)
Atlantic Region (4XXA)
Pacific Region (4XXP)
These regions are illustrated below.
060-4314-000 • Rev. C - May 2004
10 MK VI & MK VIII EGPWS Pilot Guide
EGPWS
Database
continued
MODE 1
Excessive
Descent
Rate
BASIC FUNCTIONS:
There is considerable overlap between the regions, particularly
Atlantic to Pacific, but once outside the installed database cover-
age area all enhanced functions dependent on the database are
inoperative.
Honeywell is constantly striving to improve the EGPWS database
in content, resolution, and accuracy. Notification of a Database
update is accomplished by Service bulletin. Database updates
are distributed on PCMCIA data cards and loaded via an external
PCMCIA interface unit called a Smart Cable that connects to a test
connector on the front panel of each EGPWS. Contact Honeywell
for additional information.
Because the overwhelming majority of “Controlled Flight Into
Terrain” (CFIT) accidents occur near an airport, and the fact
that aircraft operate in close proximity to terrain near an airport,
the terrain database contains higher resolution grids for airport
areas.
With the use of accurate GPS information, the EGPWS is provided
present position, altitude, track and ground speed. With this
information, the EGPWS is able to present a graphical plan view
of the aircraft relative to the terrain and advise the flight crew of
a potential conflict with the terrain or obstacle. Conflicts are rec-
ognized and alerts provided when terrain or an obstacle violates
specific computed envelope boundaries in the projected flight
path of the aircraft. Caution or warning alerts are provided in the
form of visual light annunciation, audio enunciation based on
the type of conflict, and color enhanced visual display of the ter-
rain or obstacle relative to the forward look of the aircraft. The
terrain display is provided on a Weather Radar Indicator, EFIS
display, or a dedicated EGPWS display and may or may not be
displayed automatically.
The following sections provide functional descriptions of the
EGPWS basic and enhanced functions and features, and system
input and output requirements.
Mode 1 provides alerts for excessive descent rates with respect to
altitude AGL and is active for all phases of flight. This mode has
inner and outer alert boundaries as illustrated in the diagram
and graphs on the next page.
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