User's Manual Part 1

T
2
CAS / Part No. 9000000
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
34-43-20
15 Feb 2003
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1--81
(5) Operating Procedures
Basic TAWS/RWS operating procedures on the ground include pre --flight test,
TAWS/RWS activation before takeoff, and TAWS/RWS deactivation after landing.
In--flight procedures are contained in the pilot’s manual.
(a) Pre--Flight Test
The Standard Self Test is performed by activating either the CMC self test or the
self test discrete input (RTP-- 10E = GND). The Standard Self Test can occur
while on the ground or while in the airborne state.
Upon activating the Standard Self Test the following will occur:
The Standard Self Test will not be initiated if a TA WS alert is present when
either the CMC self test or the self test discrete input is activated.
If the T
2
CAS unit has the windshear function enabled, the following aural
annunciation will occur:
”TERRAIN AWARENESS AND WINDSHEAR TEST START”
If the T
2
CAS unit does not have the windshear function enabled, the
following aural annunciation will occur:
”TERRAIN AWARENESS TEST START”
During the Standard Self Test the following will occur:
All discrete outputs implemented withi n 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 re-- activating the output for 1.5
seconds (±100 milliseconds). Any faults found will be recorded in the
T2CAS unit’s non--volatile memory.
The T
2
CAS unit will verify the following functional areas in accordance with
Figure 1-- 32.
• Aircraft Personality Module (APM)
• Terrain Database CRC
• External System Inputs
• Internal TA WS Parameters
• Internal GPS Parameters (if installed)