HAZARD AVOIDANCE

SYSTEM STATUS

During G1000 power-up, TAWS conducts a self-test of its aural and visual annunciations. The system test can also be manually initiated. An aural alert is issued at test completion. TAWS System Testing is disabled when ground speed exceeds 30 knots.

	Alert Type	PFD/MFD Alert	TAWS Page	Aural Message
		Annunciation	Annunciation
	System Test in Progress		TAWS TEST	None
	System Test Pass	None	None	“TAWS System Test OK”
	TAWS System Test Fail		TAWS FAIL	“TAWS System Failure”

Table 6-8 TAWS System Test Status Annunciations

Manually testing the TAWS System:

1)Select the TAWS Page.

2)Press the MENU Key (Figure 6-63).

3)Select ‘Test TAWS’ and press the ENT Key to confirm the selection.

Figure 6-63 TAWS Page Menu

TAWS continually monitors several system-critical items such as database validity, hardware status, and GPS status. If the terrain/obstacle database is not available, the aural message “TAWS System Failure” is generated along with the ‘TAWS FAIL’ alert annunciation.

TAWS requires a 3-D GPS navigation solution along with specific vertical accuracy minimums. Should the navigation solution become degraded or if the aircraft is out of the database coverage area, the annunciation ‘TAWS N/A’ is generated in the annunciation window and on the TAWS Page. The aural message “TAWS Not Available” is generated. When the GPS signal is re-established and the aircraft is within the database coverage area, the aural message “TAWS Available” is generated.

	Alert Type	PFD/MFD Alert	TAWS Page	Aural Message
		Annunciation	Annunciation
	No GPS position		NO GPS POSITION	“TAWS Not Available”
	Excessively degraded GPS signal
	GPS signal re-established	None	None	“TAWS Available”

Table 6-9 TAWS Status Annunciations

190-00498-03 Rev.A

Garmin G1000 Pilot’s Guide for Cessna Nav III

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