FAA AC 20-138 : 2010

Chapter 1 - General Information
Chapter 2 - Technical Standard Order Authorization (TSOA)
            and Airworthiness Approval Considerations - General
Chapter 3 - TSO Authorization
Chapter 4 - Equipment Performance - Advisory Vertical Guidance
Chapter 5 - Equipment Performance - GNSS
Chapter 6 - Equipment Performance - RNAV Multi-Sensor Equipment
Chapter 7 - Equipment Performance - RNP (General)
Chapter 8 - Equipment Performance - RNP Approach
Chapter 9 - Equipment Performance - RNP Enroute and Terminal
Chapter 10 - Equipment Performance - RNP Oceanic
Chapter 11 - Equipment Performance - Baro-VNAV
Chapter 12 - General Installation Considerations
Chapter 13 - General Installation Considerations - Antennas
Chapter 14 - General Installation Considerations - Sensors
Chapter 15 - Installation Considerations - GNSS
Chapter 16 - Installation Considerations - RNAV
             Multi-Sensor Equipment
Chapter 17 - Installation Considerations - RNP
Chapter 18 - Installation Considerations - Baro-VNAV
Chapter 19 - Installed Performance - Data Submittal
Chapter 20 - Installed Performance - Test (General)
Chapter 21 - Installed Performance - Test (GNSS)
Chapter 22 - Installed Performance - Test (RNAV
             Multi-Sensor Equipment)
Chapter 23 - Installed Performance - Test (Baro-VNAV)
Appendix 1 - GPS Oceanic/Remote Navigation
Appendix 2 - RNP AR Operations
Appendix 3 - Advanced RNP Functions
Appendix 4 - GNSS Tests to Support ADS-B
Appendix 5 - Sample Airplane/Rotorcraft Flight Manual Supplement
Appendix 6 - Installation of GNSS Equipment for VFR Use Only
Appendix 7 - RF leg Demonstration Templates
Appendix 8 - Integrating GLONASS with GNSS
Appendix 9 - Definitions and Acronyms
Appendix 10 - Related Documents

Gives guidance material for the airworthiness approval of installed positioning and navigation equipment.