14 cfr part 43.9 July 8, 2019 16 32 64 128 14 cfr part 43.9 and 43.11 14 cfr 43.9 part 43 appendix b 14 cfr 43.9 14 cfr part 43.3 14 cfr part 39 14 cfr 43.9 return to service
