Installation Overview; Introduction; Minimum System Configuration; Vfr Installation - Garmin GPS 400W Installation Manual

2 INSTALLATION OVERVIEW

2.1

Introduction

Always follow acceptable avionics installation practices per AC 43.13-1B, AC 43.13-2B, or later FAA
approved revisions of these documents. The GPS/WAAS installation instructions have been prepared to
meet the guidance material contained in AC 20-138C ―Position and Navigation Systems‖. The
communications installation instructions have been prepared to meet the guidance material defined by
AC 20-67B, ―Airborne VHF Communications Equipment Installations‖.
2.2

Minimum System Configuration

2.2.1

VFR Installation

The minimum 400W Series unit installation requires the following items for a VFR Installation:
GNS 400W Series unit (installed in the aircraft manufacturer approved location for 6.25 inch
wide avionics equipment).
GPS antenna is required for GPS navigation functions.
An external CDI is required for installations using VOR navigation and glideslope information.
A NAV antenna is required for VHF NAV functions.
A COM antenna is required for COM functions.
VFR installations must be placarded ―GPS LIMITED TO VFR USE ONLY‖ in clear view of the pilot.
2.2.2

IFR GPS Installation

In order for the 400W Series unit to be utilized for IFR GPS Navigation, the criteria in Section 2.2.1 must
be met in addition to the following:
An External CDI/HSI indicator must be installed in the pilot's primary field-of-view (or in the
aircraft manufacturer approved mounting location). The indicator must have a vertical deviation
indicator (GS) in order to perform VNAV operations / approaches.
Any annunciation required for Source Selection or IFR GPS Navigation must meet acceptable
field-of-view requirements.
To take full advantage of the 400W Series unit capabilities, an optional barometric
altitude source is recommended for automatic sequencing of fix-to-altitude (FA) and
hold-to-altitude (HA) leg types. If no barometric altitude data is provided to the
400W Series unit, FA and HA legs must be manually sequenced.
GNS 400W Series Installation Manual
190-00356-08
NOTE
Page 2-1
Rev. G