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MAGENTA dot pattern.
• If the TAWS has been inhibited (e.g. the pilot selected TERR
INHIBIT) the system will not give aural alerts. The MFD will
display a purple message block with cyan text reading, “TAWS
Inhibited”.
• The TAWS will not be available and the TERR INOP
annunciator will illuminate if any of the following components
are inoperative: MFD, PFD, GPS 1, Transponder, or Attitude
Encoder.
Revision 01: 12-15-07
P/N 11934-S30 7 of 12
Cirrus Design Section 9
SR20 Supplements
GNS-430
GPS
Avidyne PFD
Transponder
TAWS
5
AVIONICS
NON-ESSENTIAL
BUS
Configuration
Module
GMA 340
Audio Panel
SR20_FM09_2031
Avidyne MFD
KGP 560
Processor
TAWS
Annunciator Panel
Figure - 1
Honeywell KGP 560 TAWS Simplified Schematic
Revision 01: 12-15-07
8 of 12 P/N 11934-S30
Section 9 Cirrus Design
Supplements SR20
TAWS Annunciator Panel
TAWS terrain annunciations and control functions are incorporated
into the Annunciator Panel. The panel consists of a momentary
pushbutton switch (SELF TEST), an illuminated pushbutton switch
(TERR INHIBIT), and three LEDS for Terrain Warning (TERR WARN),
Terrain Caution (TERR CAUT), Terrain Inoperative (TERR INOP).
• SELF TEST - Provides test function for the TAWS.
• TERR INHIBIT - To inhibit nuisance or unwanted warnings at
airports that are not in the system database, the pilot may
select the TERR INHIBIT switch. Although selection will inhibit
all TAWS visual and aural alerts, the Terrain Awareness Display
will remain functional with the message “Warnings Inhibited”
displayed on the MFD. When activated the switch will illuminate
amber.
• TERR INOP - Indicates the TAWS inoperative. When activated
the LED will illuminate amber.
• TERR CAUT - Indicates a possible terrain or obstacle conflict
within 40-60 seconds. When activated the LED will illuminate
amber.
• TERR WARN - Indicates a possible terrain or obstacle conflict
within 30 seconds. When activated the LED will illuminate red.
The annunciators are dimmed via the instrument panel lighting
dimmer switch. The TAWS annunciator panel is powered by 28 VDC
through the 2-amp ANNUN circuit breaker on the Essential Bus
Alert Priority
When any of the TAWS aural alerts are in progress, all aural TRAFFIC
alerts are inhibited.
Advisory Callout
The advisory callout “FIVE HUNDRED”, occurs at approximately 500
feet AGL.
Revision 01: 12-15-07
P/N 11934-S30 9 of 12
Cirrus Design Section 9
SR20 Supplements
Annunciator Color Function
SELF TEST N/A Provides test function for TAWS
TERR INHIBIT AMBER All TAWS alerting functions inhibited
TERR INOP AMBER Indicates TAWS inoperative
TERR CAUT AMBER Possible terrain or obstacle conflict within 40-60 seconds
TERR WARN RED Possible terrain or obstacle conflict within 30 seconds
SELF
TEST
TERR
INHIBIT
TERR
INOP
TERR
CAUT
TERR
WARN
TAWS
SR20_FM09_2033
Figure - 2
TAWS Annunciator Panel
Revision 01: 12-15-07
10 of 12 P/N 11934-S30
Section 9 Cirrus Design
Supplements SR20
MFD Terrain Awareness Display
• WARNING •
Do not use the Terrain Awareness Display for navigation of the
aircraft. The TAWS is intended to serve as a situational
awareness tool only and may not provide the accuracy fidelity
on which to solely base terrain or obstacle avoidance
maneuvering decisions.
To select the Terrain Awareness Display Page on the MFD, rotate the
page knob to TAWS.
Terrain and obstacle alerts are the most critical situations displayed by
TAWS. There are two levels of alerts:
• Caution Alert - Possible terrain or obstacle conflict within 40-
60 seconds. When triggered, the terrain or obstacle that
caused the alert is displayed in bright yellow. In addition, a
message describing the nature of the alert is presented in the
MFD message bar.
• Warning Alert - Possible terrain or obstacle conflict within 30
seconds. When triggered, the terrain or obstacle that caused
the alert is displayed in bright red. In addition, a message
describing the nature of the alert is presented in the message
bar
When a caution or warning alert is active, the display image
surrounding the target is enlarged somewhat to allow the terrain or
obstacle to be better seen on the display.
If a terrain or obstacle alert occurs while a page other than Terrain
Awareness Display Page is being displayed, a terrain or obstacle alert
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西锐20飞机信息手册 SR22 AIRPLANE INFORMATION MANUAL 1148-126(117)
