Garmin Flight Deck 100 用户手册

®

190-00728-04 Rev. A

410

TAWS System Test Fail; Terrain, 
Airport Terrain or Obstacle 
database unavailable or invalid 
on all GDUs; software mismatch 
among GDUs; TAWS audio fault

†

“TAWS System 

Failure”

FLTA, PDA

MFD Terrain or Obstacle database 
unavailable or invalid.  TAWS 
operating with PFD Terrain or 
Obstacle databases

None

None

No GPS position

“TAWS Not 

Available”

FLTA, PDA, 

GSD

*

 

VCO 

†

Excessively degraded GPS signal, or 
out of database coverage area

None

“TAWS Not 

Available”

FLTA, PDA

Sufficient GPS signal reception 
restored

None

None

“TAWS Available”

(aural message 

only in flight)

Radar Altimeter invalid, Vertical 
Speed Invalid, GPS and Baro 
Altitude invalid, Software mismatch 
among GDUs, TAWS configuration 
mismatch among GDUs, TAWS 
audio fault

†

None

“GPWS System 

Failure”

EDR, ECR, 

NCR, FIT, 

GSD

*

          

GSD alert will be available if a valid ILS is being used for navigation, even if no valid GPS signal is being received.

†     VCO alerts are not issued if both TAWS and GPWS systems have failed or are not available.

If the aircraft bank angle exceeds 30˚, TAWS-A will disable ECR alerts. ECR alert availability returns when

the bank angle is reduced for at least eight seconds.

On an ILS, LPV, or LNAV/VNAV approach, GSD alerting will not be available if the glidepath exceeds ten

degrees.