11 Airworthiness Directives: 3 airplane, 7 rotorcraft, 1 engine.
AD 52-02-01 · published 1952
Consolidated Vultee Aircraft Corporation, Stinson Division Airplanes
AD 52-02-02 · published 1952
Univair Aircraft Corporation Airplanes
AD 52-02-03 · published 1952
Martin-Marietta Corporation Airplanes
AD 52-03-01 · published 1952
Fairchild Engine Division, Fairchild Engine and Airplane Corp. Engines
