8 Airworthiness Directives: 6 airplane, 2 rotorcraft.
AD 55-15-01 · published 1955
Aero Spacelines, Incorporated Airplanes
AD 55-15-02 · published 1955
Kelowna Flightcraft R & D Ltd. Airplanes
AD 55-15-06 · published 1955
Lockheed Aircraft Corporation Airplanes
AD 55-16-02 · published 1955
Martin-Marietta Corporation Airplanes