11 Airworthiness Directives: 9 airplane, 2 rotorcraft.
AD 48-12-03 · published 1948
Lockheed Aircraft Corporation Airplanes
AD 48-12-04 · published 1948
Lockheed Aircraft Corporation Airplanes
AD 48-13-06 · published 1948
Bellanca Aircraft Corporation Airplanes
AD 48-13-07 · published 1948
American Champion Aircraft Corp. Airplanes