Garmin MX20 Installation Manual - 1.3  Regulatory Compliance

Introduction 

4 

560-1025-09 Rev E 

MX20 Installation Manual 

1.3  Regulatory Compliance 

The MX20 is designed and tested to meet the following TSO/JTSOs when connected to the appropriate 

equipment (see Section 3.1.13):  

  FAA TSO-C63c/JTSO 2C63c  

Airborne Weather Radar 

  FAA TSO-C110a/JTSO-C110a  

Passive Thunderstorm Detection (Goodrich WX500) 

  FAA TSO-C113/JTSO-C113  

Multi-purpose Electronic Display 

  FAA TSO-C118/JTSO-C118 

Traffic Alert and Collision Avoidance (TCAS I) 

  FAA TSO-C147 

Traffic Advisory System (TAS) 

Since FAA TSO-C151a “Terrain Awareness and Warning System (TAWS)” does not include display 

requirements, the MX20 does not have TSOA for TSO-C151a.  However the MX20 is designed and 

tested to be compatible as a display device for the TSO-C151a TAWS sensors listed in Section B.6   

Garmin AT has evaluated the MX20 with respect to the guidelines of AC 23-18, Installation of Terrain 

Awareness and Warning System (TAWS) Approved for Part 23 Airplanes.  The MX20 display is not a 

requirement for Class B TAWS installations.  The MX20 improves the pilot’s situational awareness and 

complies with AC 23-18, paragraph 7.h for TAWS displays. 

The MX20 software is designed and tested to RTCA/DO-178B, levels C and D, and ED-12B, levels C 

and D. 

NOTE 

Unauthorized changes or modifications to the MX20 will void the compliance to required 

regulatory agencies and authorization for continued equipment usage.  

"The conditions and tests required for TSO/JTSO approval of this article are minimum performance 

standards.  It is the responsibility of those installing this article either on or within a specific type or class of 

aircraft to determine that the aircraft installation conditions are within the TSO/JTSO standards. If not 

within the TSO standards, the article may be installed only if the applicant documents further evaluation for 

an acceptable installation and it is approved by the Administrator. The JTSO article may be installed only if 

the installation is performed in accordance with Part 43 or the applicable airworthiness requirements.”  

1.4  Unpacking the Equipment 

Carefully unpack the equipment. Visually inspect the package contents for any evidence of shipping 

damage. Retain all shipping containers and packaging material in case reshipment is necessary. 

1.5  Package Contents 

As shipped from the Garmin AT factory, the MX20 Installation package includes most necessary items 

for installation other than supplies normally available at the installation shop. The items included in the 

package are listed in Table 1-1.