Garmin MX20 Installation Manual - page 43

   Installation 

MX20 Installation Manual 

560-1025-09 Rev E 

33 

2.9  MX20 Post Installation Checkout 

Once the unit is installed, complete the checkout procedure to verify proper operation. Refer to the MX20 

Multi-Function Display Pilot’s Guide, 560-1026-(  ), for operating instructions.  

2.9.1  Mounting/Wiring Check 

Verify that all cables are properly secured and shields are connected to the rear of the mounting frame. 

Check the movement of the flight and engine controls to verify that there is no interference. Ensure wiring 

is installed in accordance with AC 43.13-1B, Chapter 11.  

2.9.2  Software and Database Test 

1.  Turn on power to the MX20.  

2.  Verify all self-tests pass on the main startup screen.  

3.  Verify the expiration on the NavData database.  

4.  Verify the Terrain and Geography databases are applicable to the area of intended flight (CONUS, 

Alaska, etc.).  

5.  Press the MSG smart key and verify that “Unit configured for Special Terrain Mode” is NOT 

displayed.  

2.9.3  External Data Source Tests 

Verify that all external data sources are connected. See section 3.1.10 and 3.1.13 to check the compatibility 

of the external devices for use with the MX20.  

1.  Turn on power to the MX20 and the external data sources. Activate the Installation Mode (see 

section 2.7).  

2.  Verify that the MX20 data ports are configured properly. See sections 2.5.1 and 2.5.2 for details on 

the data port configuration. See section 2.7 for information on configuring the MX20 in 

Installation Mode.  

3.  Recycle power to the MX20 to reinitialize it with any changes made in the Install function settings.  

4.  Verify that the external data sources are properly configured to output the proper data to the 

Step 7-10 

Step 12-15 

Step 5