Garmin GNS 5XXW, Manual, Page: 16 / 22

190-00357-03 Rev. E AFMS, Garmin GNS 5XXW GPS/SBAS System
Page 16 of 22 FAA APPROVED
3.2.3 LOSS OF COM RADIO TUNING FUNCTIONS
If alternate COM is available:
Communications ........................................................ USE ALTERNATE COM
If no alternate COM is available:
COM RMT XFR key (if installed) ....... PRESS AND HOLD FOR 2 SECONDS
NOTE
This procedure will tune the active COM radio the emergency
frequency 121.5, regardless of what frequency is displayed on
the GNS. Certain failures of the tuning system will
automatically tune 121.5 without flight crew action.
3.2.4 TAWS CAUTION (Terrain or Obstacle Ahead, Sink Rate, Don’t
Sink)
When a TAWS CAUTION occurs, take corrective action until the alert ceases.
Stop descending or initiate either a climb or a turn, or both as necessary, based
on analysis of all available instruments and information.
3.2.5 TAWS INHIBIT
The TAWS Forward Looking Terrain Avoidance (FLTA) and Premature
Descent Alerts (PDA) functions may be inhibited to prevent alerting, if desired.
Refer to GNS 400W/500W Optional Displays Addendum for additional
information.
To Inhibit TAWS:
Go to TERRAIN Page
Menu Button ...............................................................................................PRESS
“Inhibit Terrain?” ..................................................................................... SELECT
Enter Button ................................................................................................PRESS
3.2.6 TER N/A and TER FAIL
If the amber TER N/A or TER FAIL status annunciator is displayed, the
system will no longer provide TAWS alerting or display relative terrain and
obstacle elevations. The crew must maintain compliance with procedures that
ensure minimum terrain and obstacle separation.