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--6
”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 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 T2CAS unit’ s nonvolatile
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 TAWS Parameters
• Internal GPS Parameters (if installed)
The T
2
CAS unit will display a multicolor test pattern on both the captain’s and first
officer’s TAWS displays. Figure 1--33 shows a typical multicolor test pattern.
The T
2
CAS unit will interrupt the Standard Self --Test when any of the following alerts
occur:
• “WINDSHEAR, WINDSHEAR, WINDSHEAR”
• “TERRAIN AHEAD, PULL UP”
• “TERRAIN TERRAIN, PULL UP PULL UP”
• “≈≈ PULL UP”
• “TERRAIN AHEAD”
• “TERRAIN CAUTION”
• “AVOID TERRAIN”
• “PULL UP, PULL UP”
• “TERRAIN, TERRAIN”
• “SINK RATE, SINK RATE”
• “DON’T SINK, DON’T SINK”
• “TOO LOW, TERRAIN”