9 Airworthiness Directives: 7 airplane, 2 appliance.
AD 57-14-01 · published 1957
Kelowna Flightcraft R & D Ltd. Airplanes
AD 57-14-03 · published 1957
Vickers-Armstrongs (Aircraft Limited) Airplanes
AD 57-15-01 · published 1957
Twin Commander Aircraft LLC Airplanes
AD 57-15-02 · published 1957
Airlift International, Inc., Curtiss-Wright Corporation, Flying Tiger Line, Inc., L. B. Smith Aircraft Corporation, Skyways International Trading and Transport Co., Tempo Design Corporation Airplanes
AD 57-14-02 · published 1957
Davis Aircraft Products, Inc. Appliances
