System status, Hazard avoidance – Garmin G1000 King Air C90GT User Manual

Page 372

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Garmin G1000 Pilot’s Guide for the Hawker Beechcraft C90A/GT

190-00663-01 Rev. A

358

HAZARD AVOIDANCE

SY

STEM

O

VER

VIEW

FLIGHT

INSTRUMENTS

EIS

AUDIO P

ANEL

& CNS

FLIGHT

MANA

GEMENT

HAZARD

AV

OID

ANCE

AFCS

ADDITIONAL FEA

TURES

APPENDICES

INDEX

SYSTEM STATUS

During power-up, TAWS conducts a self-test of its aural and visual annunciations. The system test can also be

manually initiated. A single chime is issued at test completion. TAWS System Testing is disabled when ground
speed exceeds 30 knots.

Alert Type

PFD/MFD Alert

Annunciation

TAWS-B Page

Annunciation

Aural Message

System Test in Progress

TAWS TEST

None

System Test Pass

None

None

Single Chime

TAWS-B System Test Fail

TAWS FAIL

“TAWS System Failure”

Table 6-10 TAWS System Test Status Annunciations

Manually testing the TAWS System:

1)

Select the TAWS-B Page.

2)

Press the MENU Key.

3)

Select ‘Test TAWS System’ and press the ENT Key to confirm the selection. (Figure 6-85)

Figure 6-85 TAWS-B 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-B 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

Annunciation

Aural Message

No GPS position
Excessively degraded GPS signal

“TAWS Not Available”

GPS signal re-established

None

“TAWS Available”

Table 6-11 TAWS Status Annunciations

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