3 Airworthiness Directives: 2 airplane, 1 rotorcraft.
AD 56-24-01 · published 1956
Kelowna Flightcraft R & D Ltd. Airplanes
AD 56-24-02 · published 1956
Kelowna Flightcraft R & D Ltd., Martin-Marietta Corporation Airplanes
AD 56-23-03 · published 1956
Orlando Helicopter Airways, Inc., Sikorsky Aircraft Corporation Helicopters