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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5--10
• If the TCAS is not operational, one or more of the red fault annunciators comes on
for a 10--second display period.
• For TA WS/RWS, an LED test will occur where all LEDs, on the T
2
CAS unit, will be
lit for a minimum of 1.5 seconds in the following colors:
-- TAWS P/F STATUS: Red
-- TAWS I/O FAIL: Amber
-- TAWS APM FAIL: Amber
-- XFER IN PROCESS: Green
-- C/F LOAD STATUS: Red
• For TA WS/RWS, an LED test will occur where all LEDs, on the T
2
CAS unit, will
then be lit for a minimum of 1.5 seconds in the following colors:
-- TAWS P/F STATUS: Green
-- TAWS I/O FAIL: Amber
-- TAWS APM FAIL: Amber
-- XFER IN PROCESS: Green
-- C/F LOAD STATUS: Green
• During the TAWS/RWS LED test, the last 10 flight legs will be reviewed for faults.
After the LEDs are illuminated, as described above, if a fault has occurred during
the last 10 flight legs then the LED associated with that fault will be lit for 11
seconds ±1 second in the following colors:
-- TAWS P/F STATUS: Red
-- TAWS I/O FAIL: Amber
-- TAWS APM FAIL: Amber
-- XFER IN PROCESS: --
-- C/F LOAD STATUS: Red
• During the TAWS/RWS L ED test, all discrete outputs implemented within a specific
aircraft installation will be tested for over current and output voltage levels by
activating the output for 1 .5 seconds (±100 milliseconds), then deactivating the
output for 1.5 seconds (±100 milliseconds), and then reactivating the output for 1.5
seconds (±100 milliseconds). Any faults found will be recorded in the T
2
CAS
unit’s nonvolatile memory. At the end of this test the XFER IN PROCESS LED will
be extinguished.
During the TAWS/RWS LED test, each time the push to test button (on the T
2
CAS
unit) is reactivated, the following will occur in the order presented:
(a) All front TAWS/Windshear LEDs will be lit for 1 second (± 0.5 seconds) in the
following colors:
• TAWS P/F STATUS: Red
• TAWS I/O FAIL: Amber