Honeywell MK VI Manuale

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This document is an unpublished work

Honeywell International Inc.

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?

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.

060-4314-000 • Rev. C - May 2004

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:

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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