8 Airworthiness Directives: 5 airplane, 3 rotorcraft.
AD 59-04-01 · published 1959
Twin Commander Aircraft LLC Airplanes
AD 59-04-02 · published 1959
Kelowna Flightcraft R & D Ltd. Airplanes
AD 59-05-02 · published 1959
de Havilland Aircraft Co., Ltd., The Airplanes
AD 59-05-03 · published 1959
Maryland Air Industries, Inc. Airplanes
AD 59-05-07 · published 1959
Vickers-Armstrongs (Aircraft Limited) Airplanes
AD 59-05-05 · published 1959
Hiller Aviation, Siam Hiller Holdings, Inc. Helicopters
