User's Manual
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
34−43−23
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Page 6−3
15 Dec 2005
C. TCAS Aural and VSI/TRA Annunciations
TCAS aural and VSI/TRA annunciations are given in Table 6−1.
Table 6−1. TCAS Aural and VSI/TRA Annunciations
VSI/TRA Annunciation
Condition Aural
Upper
Left
Upper
Right
Center Color
Notes
TRAFFIC Display
Control ON Mode
Normal Range ring and own
aircraft in view at all times,
along with qualifying
traffic.
TRAFFIC Display
Control AUTO
Mode
Normal Range ring and own
aircraft come up with
traffic when a TA or RA
exists.
Transponder Only
Mode
None TCAS
OFF
White TCAS is not operational.
STANDBY Mode None TCAS
OFF
White TCAS is not operational,
transponder is in standby.
Vertical Speed
Input Failure to
Single VSI (Dual
VSI Aircraft)
Normal RA FAIL
on failed
side
VSI FAIL
on failed
side
Yellow Vertical speed needle
removed from display with
failed data. No RAs
posted on failed side.
TCAS is operational on
remaining side.
VSI Input Failure
to Both (Dual VSI
Aircraft) or Single
VSI (Single VSI
Aircraft)
None VSI FAIL
on both
sides
TCAS
FAIL on
both sides
Yellow Vertical speed needle
removed from both VSIs
(dual VSI aircraft) or only
VSI (single VSI aircraft).
No RA information posted.
TCAS is not operational.
TA Only Mode Traffic −
Traffic
only
TA ONLY White
or
Yellow
Traffic alerts are the only
information displayed. No
RAs.
(The color changes from
white to yellow when a TA
actually occurs.)
Transponder or
Altitude Source
Fail
None TCAS
FAIL
Yellow TCAS is not operational.
Altitude Reporting
OFF
TCAS
OFF
White TCAS is not operational.
ATCRBS
Transponder
Selected
None TCAS
OFF
White TCAS is not operational.