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Description
Vol. 2 17−10−37
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
ENHANCED GROUND PROXIMITY WARNING SYSTEM (EGPWS) (CONT'D)
EGPWS Glareshield Switch/Lights
Terrain Inhibit (TERR INHB) Switch/Lights
A GPWS TERR INHB switch/light is installed above each “PULL UP/GND PROX” switch/light
on the glareshield. These switch/lights are used by the flight crew to manually inhibit the terrain
awareness alerting and display, and terrain clearance floor functions, when required. Pressing
either TERR INHIB switch/light will inhibit these functions. A second push of either switch/light
will reactivate these functions. Note that when the terrain inhibit is selected, the basic GPWS
and windshear detection functions remain operational.
If the terrain is selected for display while the terrain functions have been inhibited by the crew,
a cyan “TERRAIN INHIBITED” message replaces the “TERRAIN” message in the top left
corner of the MFD, and both switch/lights illuminate white.
The GPWS TERR INHB switchlight should be selected before flight if the airport is not in the
EGPWS database, or if GPS is not available during QFE operations.
It should also be selected during descent, within 15 NM of approach, if any of the following
conditions applies:
• Runway is less than 3,500 feet in length, or
• Airport is not in the EGPWS database, or
• Intended approach is not compatible with EGPWS terrain awareness alerting, or
• QFE operation with no GPS available
PULL UP/GND PROX Switch/Lights
The red PULL UP light is activated when an EGPWS “PULL UP” aural warning occurs. The
amber GND PROX light is activated for all other ground proximity alerts.
Momentary pushing of the PULL UP/GND PROX switch/light will activate the EGPWS self-test
when on the ground (the EGPWS self-test is inhibited in flight). In flight, a momentary push of
this switch/light may be used by the crew to cancel “Mode 5 – Below Glideslope” alerts as
required.
EGPWS Glareshield Switch/Lights
Figure 17−10−37
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−38
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
ENHANCED GROUND PROXIMITY WARNING SYSTEM (EGPWS) (CONT'D)
Controls and Indicators
EGPWS Controls and Indicators
Figure 17−10−38
PFD Indications
Figure 17−10−39
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−39
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
ENHANCED GROUND PROXIMITY WARNING SYSTEM (EGPWS) (CONT'D)
EGPWS Self−Test − Terrain Test Pattern
Figure 17−10−40
EGPWS Abnormal Annunciation
EGPWS ABNORMAL ANNUNCIATION DESCRIPTION
TERRAIN FAIL
The TAAD is inoperative due to an EGPWC internal
fault or due to the failure of a required input.
TERRAIN NOT AVAIL
The TAAD and the TCF have been temporarily
inhibited by the EGPWC because the estimated
navigation accuracy from both the GPS and the FMS
is insufficient.
TERRAIN CONTROL FAULT
The range of the terrain elevation data does not
agree with the current MFD range.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−40
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
ENHANCED GROUND PROXIMITY WARNING SYSTEM (EGPWS) (CONT'D)
MFD Terrain Abnormal Annunciations
Figure 17−10−41
EICAS Messages
The following white EICAS status messages are provided to inform the crew when EGPWS
functions are inoperative:
MESSAGE MEANING
GPWS FAIL The basic ground proximity warning function (Mode 1 to 6) is inoperative.
WINDSHEAR FAIL The windshear detection function is inoperative.
TERRAIN NOT AVAIL
The terrain awareness alerting and display functions and the terrain clearance
floor function have been temporarily disabled by the EGPWS because the FMS
navigation accuracy is insufficient.
TERRAIN FAIL The terrain awareness alerting and display functions and the terrain clearance
floor function are inoperative due to a fault condition.
The following table lists a summary of the EGPWS modes and associated indications:
GPWS Aural and Visual Alerts
MODE CONDITION
AURAL WARNING
LEVEL 1
VISUAL
WARNING
LEVEL 1
AURAL
WARNING
LEVEL 2
VISUAL
WARNING
LEVEL 2
1
Excessive descent
rate
“SINK RATE” GND PROX “PULL UP” “PULL UP”
2A
Excessive terrain
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庞巴迪挑战者604操作手册 Operating Manual 4(72)
