User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
Table 4-60: Transponder ARINC 429 Output Interface to OMS
Label Number
Data Name
275
Mode S Address Part 1
276
Mode S Address Part 2
350
XPDR Status
352 XPDR Discrete Input Status
353 XPDR P/P Status
354
LRU Identification (P/N - S/N)
356
OMS Normal Mode
377
XPDR Equipment Identification
H. TAWS/RWS Discrete Output Data
(1) Ground Discrete Parameters
This section describes the T
3
CAS TAWS/RWS ground discrete outputs. The
ground discrete outputs are used to drive alert lamps and are not activated when
power is removed from the LRU. All Ground discretes in this section are
dependent on the aircraft Flight Deck configuration and subsequent ASDB
settings.
(a) Alert Prioritization Output 1-4
These discretes exist to inform external LRUs that T
3
CAS has a higher
priority alert. For example, on the input side, if the Alert Prioritization
Input 2 Value was ’5’ and the Alert Prioritization Input 2 Discrete became
active because an engine-out condition was detected, the T
3
CAS would
suppress all of its alerts of lower priority but still allow output alerts of
priority 1 through 4. On the output side, the T
3
CAS would set only the
Alert Prioritization Output # discretes to active whose corresponding
values are of lower priority than the alert. Other LRUs capable of sensing
the states of these discretes would suppress their own alerts of lower
priority.
(b) Audio On
The Audio On output discrete is used to inhibit other audio systems (e.g.,
TCAS) during GPWS warnings. In addition, it can be used to drive the
audio key line input provided on some aircraft audio systems.
The Audio On discrete is activated whenever any aural message is being
annunciated and it remains activated until the aural message is
completed.
4-160
04 Nov 2014
34-45-29
Pub. No. 8600200-001, Revision 004
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