"2019–2023 NPIAS Report, Appendix A"(PDF). faa.gov. Federal Aviation Administration. October 2018. Archived(PDF) from the original on October 12, 2018. Retrieved December 16, 2019.
"2019–2023 NPIAS Report, Appendix A"(PDF). faa.gov. Federal Aviation Administration. October 2018. Archived(PDF) from the original on October 12, 2018. Retrieved December 16, 2019.