For S-LSA owners, the ADS-B equipment must meet the performance requirements in TSO–C166b; or TSO–C154c, and the installation (i.e., alteration) must be performed in accordance with an applicable consensus standard and authorized by the aircraft’s manufacturer.
Additionally, you cannot install uncertified equipment, including uncertified transmitters on any aircraft with a standard airworthiness certificate. Uncertified ADS-B transmitters that do not meet the performance requirements of an ADS-B TSO will not be permitted to operate in airspace requiring ADS-B after January 1, 2020. ATC cannot use the data from transmitters that do not meet most of the performance requirements of 14 CFR section 91.227 — this means ATC cannot provide flight-following services or separation services to these aircraft.
For GPS equipment, you may install an uncertified GPS on amateur-built and light-sport aircraft with experimental airworthiness certificates. As stated above, uncertified equipment must meet the performance requirements of a GPS TSO.
Again, you cannot install uncertified equipment, including an uncertified GPS on aircraft with standard airworthiness certificates. Additionally, position sources that do not meet the performance of a GPS TSO will not comply with 14 CFR section 91.227 and will not be permitted to operate in airspace requiring ADS-B.
Amateur built aircraft and light-sport aircraft owners wishing to install an uncertified device that meets the performance requirements of TSO-C166b or TSO-C154c should ensure they obtain a letter from the equipment manufacturer, stating the device meets the performance requirements of either TSO-C166b or TSO-C154c.
You can search equipment options by manufacturer at http://go.usa.gov/x9bqW.
More on this topic will be covered in future issues of FAA Safety Briefing. The bottom line is that the equipment option you choose must meet the performance requirements, and it must function properly!
5. Always Keep Your ADS-B Installation Instructions
Here’s a quick tip. Always keep the installation instructions from the supplier, including the statement of compliance, in your aircraft records just in case you have any service problems.
6. You May Not Have To Buy a New Position Source Suitable for ADS-B
Avionics vendors offer reasonably-priced, built-in approved position sources, such as WAAS GPS receivers, and package them with ADS-B transmitters.