Garmin GTX 320A, Installation Manual

GTX 320/320A Installation Manual 

Page A-1 

190-00133-01  

Rev 

M

APPENDIX A 

CERTIFICATION DOCUMENTS

A.1 Continued 

Airworthiness 

Other than for regulatory periodic functional checks, maintenance of the GTX 320/320A is “on condition” only.  
Refer to the GTX 320 and GTX 320A Maintenance Manuals.  Periodic maintenance of the GTX 320/320A is not 
required.

This section provides assistance to the installing agency in preparing Instructions for Continued Airworthiness 
(ICA) in response to Bulletin Number HBAW 98-18, “Checklist for Instructions for Continued Airworthiness for 
Major Alterations Approved Under the Field Approval Process”, effective 10/7/98. 

Aviation Authority approved installers are hereby granted permission to reference appropriate service instructions 
and excerpts from this Installation Manual to accomplish the Instructions for Continued Airworthiness.  This 
permission does not construe suitability of the documents.  It is the applicant’s responsibility to determine the 
suitability of the documents for the ICA. 

Following is a suggested ICA for a Garmin GTX 320/320A unit installation.  Some of the checklist items do not 
apply, in which case they should be marked “N/A” (Not Applicable).  

Instructions For Continued Airworthiness, Garmin GTX 320/320A 

1.

Introduction

[Aircraft that has been altered: Registration (N-) number, Make, Model and Serial Number] 

Content, Scope, 
Purpose and Arrangement:  This document identifies the Instructions for Continued Airworthiness for the 

modification of the above aircraft by installation of a Garmin GTX 320/320A. 

Applicability: 

Applies to aircraft altered by installation of the Garmin GTX 320/320A. 

Definitions/Abbreviations: None, 

N/A. 

Precautions: None, 

N/A. 

Units of Measurement: 

None, N/A. 

Referenced Publications: 

Garmin GTX 320/320A Installation Manual, P/N 190-00133-01 
Garmin GTX 320 Maintenance Manual, P/N 190-00133-02 
Garmin GTX 320A Maintenance Manual, P/N 190-00133-08 
Garmin STC # [applicable STC number for the specific model installed, refer to 
Appendix B of this manual]. 
Garmin GTX 320/320A Pilot’s Guide, P/N 190-00133-09. 

Distribution: 

This document should be a permanent aircraft record. 

2.

Description of the Alteration 

Installation of the Garmin GTX 320/320A, with interface to Encoding Altimeter or Blind Encoder.  Refer to 
section 2.4 and Appendix B of this manual for interconnect information.  Antenna installation, removal and 
replacement should be in accordance with applicable provisions of AC43.13-1B and 43.13-2A.