HomeAD libraryBy monthMay 1949ADs published in May 19492 Airworthiness Directives.April 1949June 1949AirplaneAD 49-11-01 · published 1949Sierra Hotel Aero, Inc. AirplanesSierra Hotel Aero, Inc. AirplanesAD 49-11-02 · published 1949American Champion Aircraft Corp. AirplanesAmerican Champion Aircraft Corp. Airplanes
