User's Manual Part 2

T
2
CAS / Part No. 9000000
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
34-43-20
15 Feb 2003
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6--26
Table 6--3. Computer Unit Self--Test Execution
Test Sequence Activation Test Indications
Power On Self--Test Self--Test is activated with
each application of system
power
No indication unless a fault is detected.
System status/fault data is stored in memory
for 10 consecutive flight legs. Data can be
recalled by doing the commanded self--test on
the ground.
Continuous Self--Test Executed automatically as
part of normal TCAS inflight
operation
No indication unless a fault is detected.
System status/fault data is stored in memory
for 10 consecutive flight legs. Data can be
recalled by doing the commanded self--test on
the ground.
Commanded
Self--Test
Push the front panel PUSH
TO TEST button
• All T
2
CAS TCAS front panel lamps come
on during a 3--second lamp test.
• If the TCAS is operational, the TCAS PASS
green lamp comes on for a 10--second
display period and then goes off.
• If the TCAS is not operational, one or more
red fault lamps come on for a 10--second
display period. Refer to Table 6--4 for
corrective action.
• The T
2
CAS TA WS/RWS front panel lamps
cycle as defined in Section 5
Adjustments/Test.
• If the TAWS/RWS is operational XFER IN
PROCESS LED will be extinguished and
the TA WS P/F ST ATUS green lamp comes
on for approximately 11 seconds.
• If the TAWS/RWS is not operational, T AWS
P/F STATUS, TAWS I/O FAIL, TAWS APM
F AIL, and CF LOAD STATUS LEDs will be
set for approximately 11 seconds.