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The FL function is inhibited below
18,000 feet MSL unless barometric corrected
altitude is available from an air
data computer. In this case the FL function
is available at any altitude.
If FL is selected while inhibited,“FL—-”
will replace own flight level.
A/B (Above/Below) toggle switch
selects altitude display limits.Three levels
to choose from.
ABOVE (Climb phase)
9000 feet above;2700 feet below –
Change 7.0
8700 feet above;2700 feet below –
Change 6.04a
NORMAL (Enroute phase)
2700 feet above;2700 feet below.
BELOW (Descent phase)
2700 feet above;9000 feet below –
Change 7.0
2700 feet above;8700 feet below –
Change 6.04a
(Pushbutton)
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
Function
Selector
CTA-81A/C
Control
Unit Only
(selects
operating
mode)
Moving the spring loaded knob to TEST position for
one second initiates a comprehensive self test lasting
approximately twelve seconds.Refer to the Test section
in the Appendix for a detailed description of test
functions.
STBY places Mode S transponder and TCAS system in
standby.
ALT OFF activates transponder without altitude
reporting.TCAS system in standby.
ALT ON activates transponder with altitude reporting.
TCAS system in standby.
TA Traffic Advisory mode.Presents traffic location on
TA display but does not issue Resolution Advisories.
TA mode annunciation appears on displays.Activates
transponder and altitude reporting.
TA/RA Traffic Advisory and Resolution Advisory
mode.Presents traffic location on displays and issues
audio and visual Resolution Advisories for traffic
determined to be a threat.TA/RA mode annunciation
appears on PPI or ITA-81A displays.Activates
transponder and altitude reporting.
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
There are no TCAS functions on the ATC 2 (3 most
clockwise) positions.
The left ATC 1 TEST position (CCW) tests the Mode
S transponder and the TCAS system.The right ATC 2
TEST position (CW) tests the ATCRBS transponder.
Function
Selector
CTA-81B
Control
Unit Only
(selects
operating
mode)
Moving the spring loaded knob to either TEST position
initiates a self test in the respective unit.Refer to
the Test section in the Appendix for a detailed
description of test functions.
Selection of either STBY position places both
transponders and TCAS II system in standby.
ATC 1 ON activates the Mode S transponder.TCAS in
standby.
ATC 2 ON activates the ATCRBS transponder.TCAS in
standby.
TA Traffic Advisory mode.Presents traffic location on
displays but does not issue Resolution Advisories.TA
mode annunciation appears on displays.Mode S
transponder activated with altitude reporting
TA / R A Tra ffic A d v i s o ry and Resolution A d v i s o ry mode.
P resents tra ffic location on displays and issues audio
and visual Resolution A d v i s o ries for tra ffic determ i n e d
to be a thre a t .TA/RA mode annunciation appears on
PPI or ITA-81A display s .Mode S transponder activa t e d
with altitude re p o rt i n g .
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
Weather
Radar
Indicators;
RDR-4,
RDR-1F,
RDR-1E
RDR-4,
(PPI-4B)
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
RDR-1F,
(PPI-1T)
RDR-1E,
(PPI-1U)
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
(Pushbutton)
PPI-1T,
PPI-1U
and PPI-4B
Indicator
Controls
NOTE: Control arrangement varies depending on PPI
radar configuration installed.TCAS control functions
are the same as typical unit shown.
TCAS cycles through display modes;
WX/TCAS Pop-Up,WX/TCAS Overlay,
and TCAS Only.
At Power-Up the screen initially displays
the TCAS Only mode.Pressing the TCAS
button once changes the display to WX
Only mode.
Pressing again changes the display to
WX/TCAS Overlay. (TCAS traffic is overlayed
on weather.)
Pressing again changes the display back
to the TCAS Only mode.
In WX/TCAS Pop-Up mode,the display
shows the selected radar function.
When a TA or RA occurs,the display
automatically switches to the TCAS Only
mode.The range changes to the previously
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TCASII/ACASII Collision Avoidance System User’s Manual(8)
