The Automatic Dependent Surveillance – Broadcast (ADS-B) Out rule takes effect on January 1,
2020. After this date, and unless otherwise authorized by ATC, no person may operate an
aircraft in Class A airspace or other airspace as listed in Title 14 Code ofFederal Regulations (14
CFR) part 91.225, unless the aircraft has equipment installed that meets the performance
requirements in TSO-C166b or TSO-C154c. The ADS-BOut equipment performance
requirement listed in 14 CFR 91.227(c)(1)(ii) states the aircraft’s Navigation Accuracy Category
for Velocity (NACv) must be less than 10 meters per second.
Guidance from AC 20-165B, Airworthiness Approval of Automatic Dependent Surveillance Broadcast
OUT (dated 1217/15), paragraph 3.3.3.7.3, states: A NACv = 3 or NACv = 4 should
not be set based on GNSS velocity accuracy unless you can demonstrate to the FAA that the
velocity accuracy actually meets the requirement. Furthermore, in Appendix B, paragraph
B.4.14.3, NACV = 3 or 4, states: No standard for performance has been developed to support
NACv = 3 or NACV = 4. A NACv = 3 or NACv = 4 should not be set based on GNSS velocity
accuracy unless you can demonstrate to the FAA that the error contributions have been
adequately modeled to meet those levels of performance.

This advisory circular (AC) provides information to Title 14 of the Code of Federal Regulations (14 CFR) fractional ownership program managers operating under 14 CFR part 91 subpart K (part 91K) and 14 CFR part 119 certificate holders operating under 14 CFR parts 121 and 135, seeking approval of Operations Specification (OpSpec)/Management Specification (MSpec) A063, Flightcrew Member Certificate Verification Plan. An approved certificate verification plan allows part 91K program managers and part 119 certificate holders operating under parts 121 and 135 to provide a temporary verification document to flightcrew members whose airman or medical certificates have been lost, stolen, or destroyed, or are otherwise missing. Please note that this AC is associated with the Sample OpSpec/MSpec A063 Templates document that is posted for review on the Draft OpSpecs/Management Specifications/Letters of Authorization page.

This policy statement identifies applicable structural requirements and acceptable means of
compliance for certification of external modifications, such as antennas, radomes, cameras, and
external stores, on transport category airplanes.