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LGCIU
The Landing Gear Control and Interface Unit (LGCIU)
provides a flight ground signal used by the BITE module
for flight leg counting.
It provides also a landing gear extended signal for
TCAS operation.
INDICATING
Visual indications are presented on the NDs and PFDs.
The NDs present the location of intruders in the
traffic area.
The PFDs present the avoidance maneuver indications
on the vertical speed scale.
The FWCs monitor the validity of the information.
Synthesized voice announcements generated by the TCAS
computer and broadcast by the loudspeakers accompany
the visual indications.
INHIBITION
Various discrete signals are used for inhibition by
equipment with higher priority than the TCAS.
These priorities are:
- windshear
- stall
- EGPWS messages
Consequently Traffic Advisory (TA) mode is selected
and the voice announcements are cancelled (Master
Warning P/B switch).
PIN PROGRAMMING
Some pin programs define the operating mode of the
TCAS.
Operating mode:
- audio level output,
- all traffic/threat traffic display,
- ground display mode (TA mode),
- number of intruders displayed, (8 maximum),
- aircraft altitude limit (48000Ft).
DATA LOADER
It will be possible to load software data into the
TCAS computer by means of a DATA loader.
The remote loading capability is linked by 2 ARINC 429
low speed buses to a dedicated connector in the
aircraft.
TMUTCAF01-T01 LEVEL 3
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THIS PAGE INTENTIONALLY LEFT BLANK
TMUTCAF01 LEVEL 3
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SELF EXAMINATION
The TCAS/ATC control panel controls:
A - ATC transponders and TCAS computer
directly.
B - ATC transponders directly and TCAS
computer through the ATC transponders.
C - TCAS computer directly and ATC
transponders through the TCAS computer.
The TCAS receives heading, pitch and roll data from:
A - ADIRU 1.
B - ADIRU 1 or 3 according to AIR DATA
switch status.
C - Selected ATC transponder.
TMUTCAF01 LEVEL 3
EFFECTIVITY 34-43-00 Page 6
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34 - NAVIGATION
34-43-00 TCAS CONTROL PANEL D/O
CONTENTS:
COLLINS Control Panel
SEXTANT ControL Panel
GABLES Control Panel
Self Examination
TMUTCAH05 LEVEL 2
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TCAS CONTROL PANEL D/O
COLLINS CONTROL PANEL
GENERAL
The purpose of this module is to understand the use
of the various controls of the TCAS part of the
TCAS/ATC control panel.
MODE SELECTOR
The TCAS mode of operation is selected by means of a
rotary mode selector.
- STBY and XPDR position:
The advisory generation and surveillance functions are
inhibited.
- TA position:
This mode provides only traffic advisories, it doesn’t
generate any resolution advisories.
- TA/RA position:
This is the normal operating mode, it provides the
preventive and the corrective advisories in order to
avoid conflicts with other aircraft.
-TFC position:
This mode provides all traffic indications of all
aircraft in the other, proximate, TA and RA volumes
(8 maximum).
ABOVE/N/BELOW SWITCHES
The TCAS surveillance envelope is expanded above or
below the TCAS equipped aircraft whatever the mode
selected (TA-TA/RA-TFC).
-ABOVE position:
From -2700 ft to +9900 ft.
-N (normal position):
From -2700 ft to +2700 ft.
-BELOW position:
From +2700 ft to -9900 ft.
INOP SWITCHES
The functions under INOP placards are reserved for a
future use.
TMUTCAH05-T01 LEVEL 2
EFFECTIVITY 34-43-00 Page 2
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TCAS CONTROL PANEL D/O - COLLINS
TMUTCAH05-P01 LEVEL 2
EFFECTIVITY 34-43-00 Page 3
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