AC 20-138D

Advisory circular · Airworthiness Approval of Positioning and Navigation Systems

Approved
March 28, 2014
Last reviewed
June 28, 2017
Family
AC 20-138 · 5 versions
Revision
D
14 CFR parts
1, 3, 11, 14, 15, 16, 21, 23, 25, 27, 29, 43, 91, 97, 121, 125, 135

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed October 23, 2026.

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Appendix 10

f. TSO-C146d, Stand-Alone Airborne Navigation Equipment Using the Global Positioning System (GPS) Augmented by the Satellite Based Augmentation System (SBAS).

g. TSO-C151c, Terrain Awareness and Warning System.

h. TSO-C154c, Universal Access Transceiver (UAT) Automatic Dependent Surveillance-Broadcast (ADS-B) Equipment.

i. TSO-C161a, Ground Based Augmentation System Positioning and Navigation Equipment.

j. TSO-C162a, Ground Based Augmentation System Very High Frequency Data Broadcast Equipment.

k. TSO-C165a, Electronic Map Display Equipment for Graphical Depiction of Aircraft Position.

l. TSO-C166b, Extended-Squitter Automatic Dependent Surveillance-Broadcast (ADS-B) and Traffic Information.

m. TSO-C190, Active Airborne Global Navigation Satellite System (GNSS) Antenna.

n. TSO-C194, Helicopter Terrain Awareness and Warning System.

o. TSO-C196b, Airborne Supplemental Navigation Sensors for Global Positioning System Equipment Using Aircraft-Based Augmentation.

p. TSO-C204, Circuit Card Assembly Functional Sensors using Satellite-Based Augmentation System (SBAS) for Navigation and Non-Navigation Position/Velocity/Time Output.

q. TSO-C205, Circuit Card Assembly Functional Class Delta Equipment Using the Satellite-Based Augmentation System For Navigation Applications.

r. TSO-C206, Circuit Card Assembly Functional Sensors using Aircraft-Based Augmentation for Navigation and Non-Navigation Position/Velocity/Time Output.

A10-3. RTCA, Inc. Documents (RTCA/DO) documents.

a. RTCA/DO-160G, Environmental Conditions and Test Procedures for Airborne Equipment.

b. RTCA/DO-178B, Software Considerations in Airborne Systems and Equipment Certification.

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Appendix 10

c. RTCA/DO-178C, Software Considerations in Airborne Systems and Equipment Certification.

d. RTCA/DO-187, Minimum Operational Performance Standards For Airborne Area Navigation Equipment Using Multi-Sensor Inputs.

e. RTCA/DO-189, Minimum Performance Standard for Airborne Distance Measuring Equipment (DME) Operating Within the Radio Frequency Range of 960-1215 Megahertz.

f. RTCA/DO-201A, Standards for Aeronautical Information.

g. RTCA/DO-228 with Change 1, Minimum Operational Performance Standards For Global Navigation Satellite System (GNSS) Airborne Antenna Equipment.

h. RTCA/DO-229D, Change 1, Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System(GPS/WAAS) Airborne Equipment.

i. RTCA/DO-235B, Assessment of Radio Frequency Interference Relevant to the GNSS L1 Frequency Band.

j. RTCA/DO-236C, Change 1, Minimum Aviation System Performance Standards:

Required Navigation Performance for Area Navigation.

k. RTCA/DO-246D, GNSS Based Precision Approach Local Area Augmentation System (LAAS) Signal-in-Space Interface Control Document (ICD).

l. RTCA/DO-253C, Minimum Operational Performance Standards for GPS Local Area Augmentation System Airborne Equipment.

m. RTCA/DO-254, Design Assurance Guidance for Airborne Electronic Hardware.

n. RTCA/DO-260B, Minimum Operational Performance Standards for 1090 MHz Extended Squitter Automatic Dependent Surveillance-Broadcast (ADS-B) and Traffic Information Services-Broadcast (TIS-B).

o. RTCA/DO-257A, Minimum Operational Performance Standards for the Depiction of Navigation Information on Electronic Maps.

p. RTCA/DO-282B, Minimum Operational Performance Standards for Universal Access Transceiver (UAT) Automatic Dependent Surveillance-Broadcast (ADS-B).

q. RTCA/DO-283B, Minimum Operational Performance Standards for Required Navigation Performance for Area Navigation.

r. RTCA/DO-301, Active Airborne Global Navigation Satellite System (GNSS) Antenna.

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Appendix 10

s. RTCA/DO-316, Minimum Operational Performance Standards for Global Positioning System/Aircraft-Based Augmentation System Airborne Equipment.

A10-4. Other Documents.

a. ARINC Specification 424-19, Navigation Systems Database, December 19, 2008.

Copies of this document may be requested from Aeronautical Radio Inc., 2551 Riva Road, Annapolis, Md. 21401-7435.

b. The FAA and Industry Guide to Product Certification, September 2004. Copies of this document may be obtained at:

http://www.faa.gov/aircraft/air_cert/design_approvals/media/CPI_guide_II.pdf.

c. GPS Standard Positioning Service Performance Standard, 4th edition, September, 2008. Copies of this document and general information related to GPS may be requested at http://pnt.gov/public/docs/2008/spsps2008.pdf.

d. Department of Defense IS-GPS-200D, Navstar GPS Space Segment/Navigation User Interface. Copies of this document may be requested from the GPS Joint Program Office, SSD/CZ, Los Angeles AFB, CA 90006. Alternatively, copies of this document may be requested at http://www.navcen.uscg.gov/gps/geninfo/default.htm.

e. FAA Specification Wide Area Augmentation System (WAAS), FAA-E-2892C, July 29, 2009. This document is available on-line at http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/ gnss/library/documents/.

A10-5. How to Get Related Documents.

a. Order copies of 14 CFR parts from the Superintendent of Documents, Government Printing Office (GPO), P.O. Box 979050, St. Louis, MO 63197. For general information, telephone (202) 512-1800 or fax (202) 512-2250. You can also get copies online at the GPO electronic CFR Internet website at www.gpoaccess.gov/cfr/.

b. Order copies of RTCA documents from RTCA Inc., 1828 L Street NW, Suite 805, Washington, D.C. 20036-4007. For general information, telephone (202) 833-9339 or fax (202) 833-9434. You can also order copies online at www.rtca.org.

c. You can find copies of ACs on the FAA website at http://www.faa.gov/regulations_policies/advisory_circulars/, or www.airweb.faa.gov/rgl.

d. You can find a current list of technical standard orders on the FAA Regulatory and Guidance Library at www.airweb.faa.gov/rgl. You will also find the TSO Index of Articles on the same site.

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