11 Airworthiness Directives: 6 airplane, 3 rotorcraft, 1 engine, 1 propeller.
AD 81-12-02 · published Jun 5, 1981, effective Jun 5, 1981
Lockheed Martin Corporation Airplanes
AD 79-21-09 R1 · published Jun 8, 1981, effective Jun 8, 1981
Revo, Incorporated Airplanes
AD 81-10-06 · published Jun 12, 1981, effective Jun 12, 1981
The Boeing Company Airplanes
AD 80-13-12 R1 · published Jun 15, 1981, effective Jun 19, 1981
Viking Air Limited Airplanes
AD 81-13-01 · published Jun 18, 1981, effective Jun 18, 1981
Viking Air Limited Airplanes
AD 81-13-07 · published Jun 25, 1981, effective Jun 25, 1981
Learjet Inc. Airplanes
AD 81-06-05 R1 · published Jun 1, 1981, effective Jun 1, 1981
Bell Helicopter Textron Canada Limited Helicopters
AD 81-12-03 · published Jun 11, 1981, effective Jun 11, 1981
Bell Helicopter Textron, Inc. Helicopters
AD 81-09-08 · published Jun 25, 1981, effective Jun 25, 1981
Hiller Aviation, Siam Hiller Holdings, Inc. Helicopters
AD 79-21-01 R1 · published Jun 3, 1981, effective Jun 3, 1981
Rolls-Royce Corporation Engines
AD 81-12-05 · published Jun 15, 1981, effective Jun 15, 1981
Hamilton Standard Division Propellers
