Honeywell EGPWS MK V Manual

060-4241-000 • Rev. D - March 2000
MK V & MK VII EGPWS Pilot Guide 1
MK V and MK VII
Enhanced Ground Proximity Warning System Pilot's Guide

060-4241-000 • Rev. D - March 2000
2MK V & MK VII EGPWS Pilot Guide
This document is an unpublished work
Copyright 2001
Honeywell International Inc.
All rights reserved
This document and all information and expression
contained herein are the property of Honeywell Inter-
national Inc., and is provided to the recipient in
confidence on a “need to know” basis. Your use of
this document is strictly limited to a legitimate busi-
ness purpose requiring the information contained
therein. Your use of this document constitutes ac-
ceptance of these terms.

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MK V & MK VII EGPWS Pilot Guide 3
TABLE OF CONTENTS
SECTION 1 Introduction ...................................................................... 4
SECTION 2 System Description ............................................................7
SECTION 3 Operational Procedures ...................................................46
SECTION 4 Definitions ....................................................................... 57
Request for Information ......................................................................59

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4MK V & MK VII EGPWS Pilot Guide
This Pilot Guide describes the functions and operation of the
MKV and MKVII Enhanced Ground Proximity Warning System
(EGPWS).
The 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 follow 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 operation of aircraft with
the EGPWS.
The information in this document is intended as a general
explanation of the Honeywell EGPWS. It contains a general
description of system performance assuming identified options
are active, and highlights deviations in system performance
resulting when a feature is disabled.
The EGPWS is a Terrain Awareness and Alerting system
providing terrain alerting and display functions with additional
features.
The EGPWS uses aircraft inputs including geographic position,
attitude, altitude, airspeed, and glideslope deviation. These are
used with internal terrain, obstacles, and airport databases to
predict a potential conflict between the aircraft flight path and
terrain or an obstacle. A terrain or obstacle conflict results in
the EGPWS providing 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 configura-
tion, and optionally provides bank angle and altitude callouts
based on system program pin selection. Detection of severe
windshear conditions is also provided for selected
aircraft types when enabled.
What is the
EGPWS?
S ECTION 1
Introduction

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MK V & MK VII EGPWS Pilot Guide 5
The EGPWS incorporates several “enhanced” features:
•Terrain Alerting and Display (TAD) provides a graphic dis-
play of the surrounding terrain on the Weather Radar
Indicator, EFIS, or a dedicated display. Based on the
aircraft’s 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
program pins during installation.
•“Peaks” is a TAD supplemental feature providing additional
terrain display features for enhanced situational awareness,
independent of the aircraft’s altitude. This includes digital
elevations for the highest and lowest displayed terrain,
additional elevation (color) bands, and a unique representa-
tion of 0 MSL elevation (sea level and its corresponding
shoreline). This feature is an option, enabled by program
pins during installation.
•“Obstacles” is a feature utilizing an obstacle database for
obstacle conflict alerting and display. EGPWS caution and
warning 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 program pins during installation.
•Aprocess feature called Envelope Modulation utilizes the
internal database to tailor EGPWS alerts at certain geographic
locations to reduce nuisance alerts and provide added
protection.
•ATerrain Clearance Floor feature adds an additional
element of protection by alerting the pilot of possible
premature descent. This is intended for non-precision
approaches and is based on the current aircraft position
relative to the nearest runway. This feature is enabled with
the TAD feature.
•In -210-210 and later versions, a Runway Field Clear-
ance Floor (RFCF) feature is included. This is similar to
the TCF feature except that RFCF is based on the current air-
craft position and height above the destination runway
based on Geometric Altitude (see below). This provides im-
proved protection at locations where the destination runway
is significantly higher than the surrounding terrain.
What is the
EGPWS?
continued

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6MK V & MK VII EGPWS Pilot Guide
Physical
Description
•An Aural Declutter feature reduces the repetition of warn-
ing messages. This feature is optional, and may be disabled
by system program pins during installation.
•Geometric Altitude, based on GPS altitude, is a computed
pseudo-barometric altitude designed to reduce or eliminate
altitude errors resulting from temperature extremes, non-
standard pressure altitude conditions, and altimeter
miss-sets. This ensures an optimal EGPWS alerting and dis-
play capability.
Some of these features have been added to the EGPWS as the
system evolved and are not present in all Enhanced Ground
Proximity Warning Computer (EGPWC) part numbers. For spe-
cific effectivity, refer to an applicable Airplane Flight Manual
(AFM) or EGPWS Airplane Flight Manual Supplement (AFMS) or
contact Honeywell for assistance.
The EGPWC is packaged in a 2 MCU ARINC 600-6 rack mounted
enclosure weighing less than 8 lbs. No special vibration isolation
mounting or forced air-cooling is required.
115 VAC (400 Hz.) or 28 VDC versions of the EGPWC are avail-
able. Units are also available with an internal GPS receiver for
required GPS data when another GPS source is not available.
For more detailed descriptions and information, contact
Honeywell.
What is the
EGPWS?
continued

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MK V & MK VII EGPWS Pilot Guide 7
S ECTION 2
System Description
Enhanced Ground Proximity Warning System ...............................6
EGPWS Database ................................................................................... 6
Basic Functions:
Mode 1 - Excessive Descent Rate .......................................................... 8
Mode 2 - Excessive Closure to Terrain .................................................. 9
Mode 3 - Altitude Loss After Takeoff.....................................................12
Mode 4 - Unsafe Terrain Clearance..................................................... 13
Mode 5 - Excessive Deviation Below Glideslope .................................. 17
Mode 6 - Advisory Callouts ................................................................. 19
Mode 7 - Windshear Alerting .............................................................. 23
Enhanced Functions:
Envelope Modulation.......................................................................... 25
Terrain Clearance Floor ...................................................................... 25
Runway Field Clearance Floor ............................................................. 27
Terrain Look Ahead Alerting ................................................................ 27
Terrain Alerting and Display ................................................................29
Non-Peaks Display ............................................................................... 30
Pop-Up and Auto-Range ...................................................................... 32
Peaks Display ...................................................................................... 32
Geometric Altitude ............................................................................... 36
Weather Radar Auto-Tilt ....................................................................... 37
Aural Message Priority ........................................................................ 37
System Inputs .................................................................................. 39
System Outputs .................................................................................41
Options............................................................................................... 41

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8MK V & MK VII EGPWS Pilot Guide
Enhanced
Ground
Proximity
Warning
System
The EGPWS incorporates the functions of the basic Ground
Proximity Warning System (GPWS). This includes the following
alerting modes:
Additionally, Windshear alerting (Mode 7) is provided for spe-
cific aircraft types. Mode 7 provides windshear caution and/or
warning alerts when an EGPWS windshear threshold is ex-
ceeded.
The EGPWS adds to these 7 basic functions the ability to com-
pare the aircraft position to an internal database and provide
additional alerting and display capabilities for enhanced situ-
ational awareness and safety (hence the term “Enhanced”
GPWS).
The EGPWS internal database consists of four sub-sets:
1. A worldwide terrain database of varying degrees of resolu-
tion.
2. An obstacles database containing cataloged obstacles 100
feet or greater in height located within North America and
portions of the Caribbean (expanding as data is obtained).
3. A worldwide airport database containing information on
hard-surface runways 3500 feet or longer in length. For a
specific list of the airports included, refer to Honeywell
document 060-4267-000 or access on the Internet at
website www.egpws.com.
4. An Envelope Modulation database to support the Envelope
Modulation feature discussed later.
EGPWS
Database

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MK V & MK VII EGPWS Pilot Guide 9
Honeywell is constantly striving to improve the EGPWS data-
base in content, resolution, and accuracy. Notification of a
Database update is accomplished by Service Bulletin. Data-
base updates are distributed on PCMCIA data cards and
downloaded via a card slot in the front panel of each EGPWC.
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 air-
port, the terrain database contains higher resolution grids for
airport areas. Lower resolution grids are used outside airport
areas where aircraft enroute altitude make CFIT accidents less
likely and terrain feature detail is less important to the flight
crew.
With the use of accurate GPS or FMS information, the EGPWS
is provided present position, 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. Con-
flicts are recognized and alerts provided when terrain violates
specific computed envelope boundaries on the projected flight
path of the aircraft. Alerts are provided in the form of visual
light annunciation of a caution or warning, audio enunciation
based on the type of conflict, and color enhanced visual display
of the terrain or obstacle relative to the forward look of the air-
craft. The terrain display is provided on the 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 sys-
tem input and output requirements.
EGPWS
Database
continued

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10 MK V & MK VII EGPWS Pilot Guide
BASIC FUNCTIONS:
MODE 1
Excessive
Descent
Rate
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 graph below.
Penetration of the outer boundary activates the EGPWS caution
lights and “SINKRATE, SINKRATE” alert enunciation.
Additional “SINKRATE, SINKRATE ” messages will occur for
each 20% degradation.
Penetration of the inner boundary activates the EGPWS
warning lights and changes the audio message to “PULL UP”
which repeats continuously until the inner warning boundary
is exited.
Note: “Pull Up” may be preceded by “Whoop, Whoop” in
some configurations based on the audio menu option selected.
If a valid ILS Glideslope front course is received and the aircraft
is above the glideslope centerline, the outer (sinkrate)
boundary is adjusted to desensitize the sinkrate alerting. This
is to prevent unwanted alerts when the aircraft is safely
capturing the glideslope (or repositioning to the centerline)
from above the beam.
Radio Altitude (FEET)
Descent Rate (FEET/MINUTE)
3000
2500
2000
1500
1000
500
0
2000 4000 6000 8000 1000
"SINKRATE"
"PULL UP!"
0
"SINKRATE"
"PULLUP"
"SINKRATE SINKRATE"
"PULL UP"
Glideslope
Deviation
Bias

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MK V & MK VII EGPWS Pilot Guide 11
If the Aural Declutter feature is disabled, the sinkrate alert
boundary remains fixed and the aural message “SINKRATE”
repeats continuously until the outer boundary is exited.
The EGPWS offers a Steep Approach option for given aircraft
types that desensitizes the alert boundaries to permit steeper
than normal approaches without unwanted alerts.
Mode 2 provides alerts to help protect the aircraft from
impacting the ground when rapidly rising terrain with respect
to the aircraft is detected. Mode 2 is based on Radio Altitude
and on how rapidly Radio Altitude is decreasing (closure rate).
Mode 2 exists in two forms, 2A and 2B.
Mode 2A is active during climbout, cruise, and initial approach
(flaps not in the landing configuration and the aircraft not on
glideslope centerline). If the aircraft penetrates the Mode 2A
caution envelope, the aural message “TERRAIN, TERRAIN” is
generated and cockpit EGPWS caution lights will illuminate. If
the aircraft continues to penetrate the envelope, the EGPWS
warning lights will illuminate and the aural warning message
“PULL UP” is repeated continuously until the warning
envelope is exited.
Note: “Pull Up” may be preceded by “Whoop, Whoop” in some
configurations based on the audio menu option selected.
Upon exiting the warning envelope, if terrain clearance
continues to decrease, the aural message “TERRAIN” will be
given until the terrain clearance stops decreasing. In addition,
the visual alert will remain on until the aircraft has gained 300
feet of barometric altitude, 45 seconds has elapsed, or landing
flaps or the flap over-ride switch is activated.
M ODE 1
Continued
MODE 2
Excessive
Closure to
Terrain
MODE 2A
Steep
Approach
Bias

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12 MK V & MK VII EGPWS Pilot Guide
The graph below shows how the upper boundary of the Mode 2
alert envelope varies as a function of the aircraft speed. As
airspeed increases from 220 knots to 310 knots, the boundary
expands to provide increased alert times at higher airspeeds.
M ODE 2 A
Continued
With version -210-210 and later models, the Mode 2A upper
limit is reduced to 1250 feet for all airspeeds when the Terrain
Alerting and Display (TAD) function is enabled and available.
This is due to the enhanced alerting capability provided with
TAD, resulting from high integrity GPS Altitude and Geometric
Altitude data. The Mode 2A envelope is lowered in order to
reduce the potential for nuisance alerts during an approach.

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MK V & MK VII EGPWS Pilot Guide 13
Mode 2B provides a desensitized alerting envelope to permit
normal landing approach maneuvers close to terrain without
unwanted alerts. Mode 2B is automatically selected with flaps
in the landing configuration (landing flaps or flap over-ride
selected) or when making an ILS approach with Glideslope
and Localizer deviation less than 2 dots. It is also active during
the first 60 seconds after takeoff.
With version -210-210 and later models, Mode 2B is selected
when the aircraft is within 5nm and 3500 feet of the
destination airport (independent of configuration) and the
Terrain Alerting and Display (TAD) function is enabled and
available. This is due to the enhanced alerting capability
provided with TAD, resulting from high integrity GPS Altitude
and Geometric Altitude data. The Mode 2B envelope is
selected in order to reduce the potential for nuisance alerts
during an approach.
M ODE 2B
The graph above shows the Mode 2B envelope.

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14 MK V & MK VII EGPWS Pilot Guide
M ODE 3
Altitude
Loss After
TakeOff
During an approach, if the aircraft penetrates the Mode 2B
envelope with either the gear or flaps not in the landing
configuration, the aural message “TERRAIN, TERRAIN” is gen-
erated and the EGPWS caution lights illuminate. If the
aircraft continues to penetrate the envelope, the EGPWS
warning lights illuminate and the aural message “PULL UP” is
repeated continuously until the warning envelope is exited. If
the aircraft penetrates the Mode 2B envelope with both gear
and flaps in the landing configuration, the aural “PULL UP”
messages are suppressed and the aural message “TERRAIN” is
repeated until the envelope is exited.
Mode 3 provides alerts for significant altitude loss after takeoff
or low altitude go-around (less than 245 feet AGL) with gear or
flaps not in the landing configuration. The amount of altitude
loss that is permitted before an alert is given is a function of the
height of the aircraft above the terrain as shown below. This
protection is available until the EGPWS determines that the
aircraft has gained sufficient altitude that it is no longer in the
takeoff phase of flight. Significant altitude loss after takeoff or
during a low altitude go-around activates the EGPWS caution
M ODE 2B
Continued

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MK V & MK VII EGPWS Pilot Guide 15
M ODE 4
Unsafe
Terrain
Clearance
M ODE 4 A
lights and the aural message “DON’T SINK, DON’T SINK”. The
aural message is only enunciated twice unless altitude loss
continues. Upon establishing a positive rate of climb, the
EGPWS caution lights extinguish and the aural alert will cease.
If the Aural Declutter feature is disabled, the warning is
enunciated continuously until positive climb is established.
Mode 4 provides alerts for insufficient terrain clearance with
respect to phase of flight, configuration, and speed. Mode 4
exists in three forms, 4A, 4B, and 4C.
•Mode 4A is active during cruise and approach with the gear
and flaps not in the landing configuration.
•Mode 4B is active during cruise and approach with the gear
in the landing configuration and flaps not in the landing
configuration.
•Mode 4C is active during the takeoff phase of flight with
either the gear or flaps not in the landing configuration.
Mode 4 alerts activate the EGPWS caution lights and aural
messages.
To reduce nuisance alerts caused by over-flying another
aircraft, the upper limit of the Mode 4A/B alerting curve can be
reduced (from 1000) to 800 feet. This occurs if the airplane is
above 250 knots with gear and flaps not in landing
configuration and a sudden change in Radio Altitude is
detected. This is intended to eliminate nuisance alerts while
flying a holding pattern and an aircraft over-flight occurs (with
1000 foot separation).
With version -210-210 and later models, Mode 4 airspeed
expansion is disabled (upper limit held at lowest airspeed
limit) when the Terrain Alerting and Display (TAD) function is
enabled and available. This is due to the enhanced alerting
capability provided with TAD, resulting from high integrity GPS
Altitude and Geometric Altitude data. This change to the Mode
4 envelopes reduces the potential for nuisance alerts when the
aircraft is not in the landing configuration.
Mode 4A is active during cruise and approach with gear and
flaps up. This provides alerting during cruise for inadvertent
flight into terrain where terrain is not rising significantly, or the
M ODE 3
Continued

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16 MK V & MK VII EGPWS Pilot Guide
M ODE 4 A
Continued
M ODE 4 B
aircraft is not descending excessively. It also provides alerting
for protection against an unintentional gear-up landing.
Below 1000 feet AGL and above 190 knots airspeed, the Mode
4A aural alert is “TOO LOW TERRAIN”. This alert is
dependent on aircraft speed such that the alert threshold is
ramped between 500 feet at 190 knots to 1000 feet at 250
knots.
Below 500 feet AGL and less than 190 knots airspeed, the
Mode 4A aural alert is “TOO LOW GEAR”.
For either Mode 4A alert, subsequent alert messages occur only
if penetration of the envelope increases by 20%. EGPWS
caution lights extinguish and aural messages cease when the
Mode 4A alert envelope is exited.
If the Aural Declutter feature is disabled, mode 4A alert
messages are repeated continuously until the Mode 4A
envelope is exited.
Mode 4B is active during cruise and approach, with gear down
and flaps not in the landing configuration.
Below 1000 feet AGL and above 159 knots airspeed, the Mode
4B aural alert is “TOO LOW TERRAIN”. This alert is dependent
on aircraft speed such that the alert threshold is ramped be-

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MK V & MK VII EGPWS Pilot Guide 17
tween 245 feet at 159 knots to 1000 feet at 250 knots.
Below 245 feet AGL and less than 159 knots airspeed, the Mode
4B aural alert is “TOO LOW FLAPS”. For turboprop and select
turbofan aircraft, the “TOO LOW FLAPS” warning curve is
lowered to 150 feet AGL and less than 148 knots.
If desired, the pilot may disable the “TOO LOW FLAPS” alert by
engaging the Flap Override switch (if installed). This precludes
or silences the Mode 4B flap alert until reset by the pilot.
If the aircraft’s Radio Altitude decreases to the value of the MTC,
the EGPWS caution illuminates and the aural message “TOO
LOW TERRAIN” is enunciated.
For either Mode 4B alert, subsequent alert messages occur only
if penetration of the envelope increases by 20%. EGPWS caution
lights extinguish and aural messages cease when the Mode 4B
alert envelope is exited.
M ODE 4B
Continued
If the Aural Declutter feature is disabled, mode 4B alert
messages are repeated continuously until the Mode 4B
envelope is exited.
The Mode 4C alert is intended to prevent inadvertent controlled
flight into the ground during takeoff climb into terrain that
produces insufficient closure rate for a Mode 2 alert. After
takeoff, Mode 4A and 4B provide this protection.
M ODE 4C

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18 MK V & MK VII EGPWS Pilot Guide
Mode 4C is based on an EGPWS computed Minimum Terrain
Clearance (MTC) floor, that increases with Radio Altitude. It is
active after takeoff when the gear or flaps are not in the landing
configuration. It is also active during a low altitude go-around
if the aircraft has descended below 245 feet AGL.
At takeoff the Minimum Terrain Clearance (MTC) is zero feet.
As the aircraft ascends the MTC is increased to 75% of the
aircraft’s Radio Altitude (averaged over the previous 15
seconds). This value is not allowed to decrease and is limited
to 500 feet AGL for airspeed less than 190 knots. Beginning at
190 knots, the MTC increases linearly to the limit of 1000 feet
at 250 knots.
If the aircraft’s Radio Altitude decreases to the value of the
MTC, the EGPWS caution illuminates and the aural message
“TOO LOW TERRAIN” is enunciated.
EGPWS caution lights extinguish and aural messages cease
when the Mode 4C alert envelope is exited.
If the Aural Declutter feature is disabled, mode 4C alert
messages are repeated continuously until the Mode 4C
envelope is exited.
M ODE 4C
Continued

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MK V & MK VII EGPWS Pilot Guide 19
M ODE 5
Mode 5 provides two levels of alerting for when the
aircraft descends below glideslope, resulting in
activation of EGPWS caution lights and aural messages.
The first level alert occurs when below 1000 feet Radio
Altitude and the aircraft is 1.3 dots or greater below the
beam. This turns on the caution lights and is called a
“soft” alert because the audio message “GLIDESLOPE”
is enunciated at half volume. 20% increases in the
glideslope deviation cause additional “GLIDESLOPE”
messages enunciated at a progressively faster rate.
The second level alert occurs when below 300 feet Radio
Altitude with 2 dots or greater glideslope deviation. This
is called a “hard” alert because a louder
“GLIDESLOPE, GLIDESLOPE” message is enunciated
every 3 seconds continuing until the “hard” envelope is
exited. The caution lights remain on until a glideslope
deviation less than 1.3 dots is achieved.
Excessive
Deviation
Below
Glideslope
To avoid unwanted Below Glideslope alerts when
capturing the localizer between 500 and 1000 feet AGL,
alerting is varied in the following ways:
• Below Glideslope alerts are enabled only if the
localizer is within 2 dots, landing gear and flaps
are selected, Glideslope Cancel is not active, and
a front course approach is determined.

060-4241-000 • Rev. D - March 2000
20 MK V & MK VII EGPWS Pilot Guide
•The upper altitude limit for the alert is modulated with
vertical speed. For descent rates above 500 FPM, the upper
limit is set to the normal 1000 feet AGL. For descent rates
lower than 500 FPM, the upper limit is desensitized
(reduced) to a minimum of 500 feet AGL.
Additionally, both alert levels are desensitized below 150 feet
AGL, to allow for normal beam variations nearer the ground,
and reduce the possibility of nuisance alerts.
If the Aural Declutter feature is disabled, messages are repeated
continuously until the Mode 5 envelope is exited.
Mode 5 alerts can be canceled by pressing the Glideslope
Cancel switch (if installed). The EGPWS will interpret this
switch one of two ways depending on the installation
configuration.
•Astandard glideslope cancel switch allows for manually
canceling Mode 5 alerting any time below 2000 feet AGL.
This is automatically reset when the aircraft descends below
30 feet or climbs above 2000 feet AGL.
•An alternate glideslope cancel switch allows for manually
canceling Mode 5 alerting at any time and any altitude. The
cancel is reset by again pressing the cancel switch, or
automatically if gear or flaps are raised, or the aircraft is on
the ground. Due to the nature of the alternate cancel
switch, this method requires that there be a cockpit
annunciation that glideslope cancel is in effect.
EGPWS Mode 5 alerts are inhibited during backcourse
approaches to prevent nuisance alerts due to false fly up lobes
from the Glideslope. The EGPWC determines a backcourse
approach if either: 1) the aircraft’s magnetic track is greater
than 90 degrees from the runways approach course, or 2) a
glideslope inhibit discrete is set.
M ODE 5
Continued