Garmin International Inc 0181200 Manual De Usuario

190-01277-00

GRA 5500 Installation Manual

Rev. A

Page 2-3

Fabrication of a wiring harness is required.  Sound mechanical and electrical methods and practices are 
required for installation of the GRA 5500.

The GRA 5500 requires two antennas to be installed for each system installation.  One antenna is used to 
transmit the radar signal, and the other is used to simultaneously receive the reflected signal.

Each GRA 5500 system fulfills all TSO minimum accuracy requirements when installed with either one or 
two additional GRA 5500 systems on the same aircraft.  Mutual interaction is not operationally significant.  
See 

 for guidance in planning antenna locations for multi-unit installations.  The second and/

or third unit in a multi-unit installation is selected by strapping the respective discrete input(s) on each unit 
per Table 2-5.

Cable installations (both wiring harness and coaxial antenna cables) on pressurized cabin aircraft require 
FAA approved installation design and engineering substantiation data whenever such installations 
incorporate alteration (penetration) of the cabin pressure vessel by connector holes and/or mounting 
arrangements.

For needed engineering support pertaining to the design and approval of such pressurized aircraft 
installations, it is recommended that the installer proceed according to any of the following listed 
alternatives:

1. Obtain approved installation design data from the aircraft manufacturer.

2. Obtain an FAA approved STC, pertaining to and valid for the subject installation.

3. Contact the FAA Aircraft Certification Office in the appropriate Region and request identification 

of FAA Designated Engineering Representatives (DERs) who are authorized to prepare and 
approve the required installation engineering data.

4. Locate an appropriate consultant FAA DER from the “FAA Consultant DER Directory” at the 

FAA “Designee and Delegation” web page.

5. Contact an aviation industry organization such as the Aircraft Electronics Association for 

assistance.

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