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remains available if radio altitude information is lost. A
GA is formulated from the available altitude data
sources for computing the terrain display. A display
generated without radio altitude should be used only
as a general cue for terrain awareness, and should not
be relied upon for navigational purposes.
5. Controls and Indications:
A. Circuit Breakers (CBs):
Circuit Breaker Name: CB Panel: Location: Power Source:
EGPWS AC CPO D-10 L MAIN 115V AV φC
EGPWS DC CPO E-10 L MAIN 28V DC
B. Advisory (Blue) CAS Messages:
CAS Message: Cause of Meaning:
GPWS FAIL Ground Proximity Warning System (GPWS) has failed.
WINDSHEAR FAIL Failure of essential input data from one or more of the
following: AOA, Stall Warning System or IRS
accelerometers.
TERRAIN INHIBITED Terrain inhibit switch selected ON.
TERRAIN NOT AVAIL Airplane position cannot be determined due to failure /
malfunction in GPS and / or IRS systems.
C. System Test:
The GPWS switch on the TEST panel, located on the cockpit center
console (location varies) initiates an EGPWS system self-test. Prior to
initiating a self-test, determine that the following conditions are met:
• Normal airplane power is available and EGPWS is ON
• No O-RIDE switches are selected (TERR INHIB, RAD ALT VOICE
O/R or GPWS VOICE O/R)
• No GPWS inoperative annunciations are displayed on CAS
Pressing the GPWS TEST switch will result in the following indications if
the system is functioning normally:
• CAS messages GPWS FAIL, WINDSHEAR FAIL, TERRAIN
INHIBITED and TERRAIN NOT AVAIL displayed
• Amber caution light BELOW G/S on
• “GLIDESLOPE” annunciation over cockpit speakers and interphone
• Amber BELOW G/S light extinguishes
• Blue G/S INHIBIT light on
• Blue G/S INHIBIT light extinguishes
• Red PULL UP text warning displayed on PFD
• “PULL UP” aural annunciation over cockpit speakers and interphone
OPERATING MANUAL
2A-34-00 PRODUCTION AIRCRAFT SYSTEMS
Page 34
October 11/01
Revision 5
• Red PULL UP text warning clears
• Red WINDSHEAR text warning displayed on PFD
• “WINDSHEAR, WINDSHEAR, WINDSHEAR” aural annunciation
over cockpit speakers and interphone
• Red WINDSHEAR text warning clears
• Amber WINDSHEAR text caution displayed on PFD
• Amber WINDSHEAR text caution clears
• Red PULL UP text warning displayed on PFD
• “TERRAIN, TERRAIN” aural warning followed by “PULL UP, PULL
UP” aural warning annunciated over cockpit speakers and
interphone
• Terrain test pattern shown on cockpit displays
• Red PULL UP text warning clears
• CAS messages GPWS FAIL, WINDSHEAR FAIL, TERRAIN
INHIBITED and TERRAIN NOT AVAIL clear
• Terrain test pattern clears on cockpit displays
6. Limitations:
A. Flight Manual Limitations:
(1) Pilot’s Manuals:
The Honeywell Enhanced Ground Proximity Warning System Pilot’s
Guide, Publication Number 060-4241-000, Revision D, dated March
2000 (or later approved revision appropriate to the software version
below) shall be immediately available to the pilots for -208 -208 (SN
1390 through 1425) or -210 -210 (SN 1426 and subsequent).
(2) Clearance:
Pilots are authorized to deviate from their current Air Traffic Control
(ATC) clearance to the extent necessary to comply with an EGPWS
warning.
(3) Navigation:
Navigation is not to be predicated upon the use of the Terrain
Display.
(4) Database:
The EGPWS database, displays and alerting algorithms currently
account for man-made obstructions.
(5) Terrain Display:
The Terrain Display is intended to serve as a situational awareness
tool only, and may not provide the accuracy and / or fidelity on which
to solely base terrain avoidance maneuvering.
Terrain Display shall be selected OFF when within 15 NM of landing
at an airport when:
• The airport has no published instrument approach procedure
(-104 -104 software version only).
• The longest runway is less than 3500 ft in length.
• The airport is not in the EGPWS database.
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS 2A-34-00
Page 35
October 11/01
Revision 5
(6) TAWS:
The production EGPWS installation meets the requirements for
Class A TAWS as defined in Advisory Circular AC 25-23.
7. System Notes:
The EGPWS database consists of three (3) smaller databases:
• Terrain database that covers most of the earth
• Obstacles database that covers all charted obstacles in North America and
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湾流4操作手册 Gulfstream IV Operating Manual 2(120)
