AC 20-172A

Historical

Advisory circular · Airworthiness Approval for ADS-B In Systems and Applications

A newer version is currentThis is a historical version. AC 20-172B is the version in force, approved May 20, 2015.
Approved
March 23, 2012
Last reviewed
April 17, 2012
Cancels
AC20-172
Cancelled by
AC20-172B
Family
AC 20-172 · 3 versions
Revision
A
14 CFR parts
23, 25

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 21, 2025.

Show pages 31–42

Appendix 4

A4-4 ARINC 735B, Mark 2 Traffic Alert and Collision Avoidance System (TCAS).

ARINC 738A, Air Data and Inertial Reference System (ADRS).

ARINC 743A, GNSS Sensor.

4. SAE Documents.

SAE ARP 4754A, Guidelines for Development of Civil Aircraft Systems.

SAE ARP 4761, Guidelines and Methods for Conducting the Safety Assessment Process on Civil Airborne Systems and Equipment.

5. How to Get Related Documents:

a. You can get copies of the 14 CFR parts referenced in this AC online from the GPO electronic CFR Internet website at www.gpoaccess.gov/cfr/.

b. Order copies of RTCA documents from RTCA Inc., , 1150 18th St. NW, Suite 910, Washington, D.C. 20036. For general information, telephone (202) 833-9339 or fax (202) 833- 9434. You can also order copies online at http:/www.rtca.org.

c. Order copies of ARINC documents from ARINC Incorporated, 2551 Riva Rd., Annapolis, MD, 21401. Telephone +1 800-633-6882, fax +1 410-956-5465.

You can also get copies from their website at www.arinc.com.

d. Order copies of SAE documents from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, telephone (724) 776-4970, fax (724) 776-0790. Also, order copies online at www.sae.org.

e. Order copies of advisory circulars from the U.S. Department of Transportation, Subsequent Distribution Office, M-30, Ardmore East Business Center, 3341 Q 75th Avenue, Landover, MD 20785. You can also get copies from our website at http://www.faa.gov/regulations_policies/advisory_circulars/ or www.airweb.faa.gov/rgl.