Garmin MX20 Installation Manual page 41

3. Obtain ICAO address of the aircraft from the FAA only if the UAT/ADS-B system is installed. The
ICAO address is a unique eight number code assigned to each aircraft. For U.S. registered aircraft,
it will be necessary to have a specific address code assigned. These address codes are presently
issued by:
Federal Aviation Administration
FAA Aircraft Registry
P.O. Box 25504
Oklahoma City, OK 73125
Tel: 405 954 3116
Fax: 405 954 3548
If the aircraft is registered in a country other than the United States, please contact the local
aviation authority of the country in which the aircraft is registered.
The ICAO information entered on the MX20 is not used by the GDL 90, but should match the
ICAO information entered into the GDL 90 Aircraft Personality Module (APM). When connected
to a GDL 90, the MX20 will display the ICAO information received from the GDL 90.
4. Enter in Flight ID. (Required if UAT/ADS-B system is installed.)
5. Enter Category Code. (Required if UAT/ADS-B system is installed.)
Category Code
Small
Medium
Large
Extra Large
Heavy
High Performance
6. Enter in Ownship Symbol (Single Engine, Twin, or Jet).
7. Set the Terrain Clearance Mode to Normal for all operations.
MX20 Installation Manual
Aircraft Weight
< 15,500 lbs.
15,500 to 75,000 lbs.
75,000 to 190,000 lbs.
190,000 to 300,000 lbs.
> 300,000 lbs.
> 5g acceleration and > 400 kts
560-1025-09 Rev E
Installation
See Step 13
31