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awareness display.
If a terrain display fault condition is present when the terrain is being displayed, one of the
following yellow messages will be presented in the bottom right corner of the PFD and MFD
(i.e., in the weather radar fault message field): “TERRAIN FAIL”, “TERRAIN CONTROL
FAULT”, “TERRAIN NOT AVAIL”. All terrain messages, except the normal condition
“TERRAIN”, flash for 10 seconds when they are posted.
Terrain/Obstacle Awareness Caution Alert
If the aircraft penetrates the caution envelope boundary, the aural message “CAUTION
TERRAIN” or “CAUTION OBSTACLE” is generated, and the amber GND PROX message
flashes. Simultaneously, terrain/obstacle areas which conflict with the caution criteria are shown
in solid yellow color on the terrain awareness display.
The caution alert is typically given 60 seconds ahead of a terrain/obstacle conflict.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−28
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
TERRAIN AWARENESS WARNING SYSTEM (TAWS) (CONT'D)
Terrain/Obstacle Awareness Caution Alert
Figure 17−10−30
Terrain/Obstacle Awareness Warning Alert
If the aircraft penetrates the warning envelope boundary, the aural message “TERRAIN
TERRAIN, PULL UP” or “OBSTACLE, OBSTACLE, PULL UP” is generated, and the red “PULL
UP” message flashes. Simultaneously, terrain/obstacle areas which conflict with the warning
criteria are shown in solid red color on the terrain awareness display.
The warning alert is typically given 30 seconds ahead of a terrain/obstacle conflict.
Terrain/Obstacle Awareness Warning Alert
Figure 17−10−31
TAWS WARNING Panel
The TAWS WARNING panel is installed on the center pedestal, below the landing gear handle.
The panel has three switch/lights and one TEST toggle switch.
The GS switch/light inhibits Mode 5, glideslope alert.
The FLAPS switch/light inhibits Mode 4B, flaps not in landing configuration with gear extended
alert.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−29
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
TERRAIN AWARENESS WARNING SYSTEM (TAWS) (CONT'D)
The TERRAIN switch/light inhibits the TCF and TAAD terrain functions. Modes 1 to 7 remain
operational.
The TEST toggle switch initiates the TAWS self-test when on ground (TAWS self-test is
inhibited in flight).
If the terrain is selected for display while the terrain functions have been inhibited by the crew, a
cyan “TERRAIN OFF” message replaces the “TERRAIN” message in the bottom right corner of
the PFD or MFD, and the TERRAIN switch/light illuminates white.
The TAWS WARNING panel TERRAIN switchlight should be selected before flight if the airport
is not in the TAWS 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 TAWS database, or
• Intended approach is not compatible with TAWS terrain awareness alerting, or
• QFE operation with no GPS available.
TAWS WARNING Panel
Figure 17−10−32
Controls and Indicators
TAWS Controls and Indicators
Figure 17−10−33
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−30
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
TERRAIN AWARENESS WARNING SYSTEM (TAWS) (CONT'D)
PFD Indications
Figure 17−10−34
TAWS Self-Test − Terrain Test Pattern
Figure 17−10−35
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−31
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
TERRAIN AWARENESS WARNING SYSTEM (TAWS) (CONT'D)
TAWS Abnormal Annunciation
TAWS ABNORMAL
ANNUNCIATION
DESCRIPTION
TERRAIN FAIL The TAAD is inoperative due to an TAWS 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 TAWS computer
because the estimated navigation accuracy from both the GPS and the FMS is
insufficient.
TERRAIN RANGE
XXX NM
Indicates the selected display range does not agree with TAWS transmitted
range.
TERRAIN OFF The terrain overlay is selected off.
MFD Terrain Abnormal Annunciations
Figure 17−10−36
EICAS Messages
The following white EICAS status messages are provided to inform the crew when TAWS
　
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