Alert Type
PFD/MFD
TAWS Page
Annunciation
MFD
Pop-Up
Alert
Aural Message
TAWS System Test Fail
None “TAWS System Failure”
TAWS Alerting is disabled
None None
No GPS position or
excessively
degraded GPS signal
None
“TAWS Not Available”
“TAWS Available” will be heard
when sufcient
GPS signal is re-established.
System Test in progress
None None
System Test pass None None “TAWS System Test OK”
Figure 7-94 – TAWS System Status Annunciations
Trafc Advisory System (TAS) Annunciations
Trafc Map Page Annunciation Description
NO DATA
Data is not being received from the TAS unit
DATA FAILED
Data is being received from the TAS unit, but the unit
is self-reporting a failure
FAILED
Incorrect data format received from the TAS unit
Figure 7-95 – TAS Failure Annunciations
Mode
Trafc Mode Annunciation
(Trafc Map Page)
Trafc Display Enabled Icon
(Other Maps)
TAS Self-test Initiated
TEST
(also shown in white in center of page)
TAS Operating
OPERATING
TAS Standby
STANDBY
(also shown in white in center of page)
TAS Failed
FAIL
Figure 7-96 – TAS Mode Annunciations
CAUTION: The “TAWS NOT AVAILABLE” aural annunciation is inhibited
on the ground to prevent repeated nuisance annunciations when taxiing,
where the GPS signal can be intermittent. The pilot shall visually ensure
that TAWS N/A is not shown on the PFD prior to departure.
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