17 Airworthiness Directives: 10 airplane, 3 rotorcraft, 3 engine, 1 appliance.
AD 74-08-07 · published Feb 1, 1977, effective Feb 1, 1977
The Boeing Company Airplanes
AD 77-02-09 · published Feb 3, 1977, effective Feb 3, 1977
Cessna Aircraft Company Airplanes
AD 77-02-10 · published Feb 4, 1977, effective Feb 4, 1977
Bombardier Inc. Airplanes
AD 77-03-03 · published Feb 7, 1977, effective Feb 9, 1977
Piper Aircraft Inc. Airplanes
AD 77-04-01 · published Feb 14, 1977, effective Feb 14, 1977
Twin Commander Aircraft LLC Airplanes
AD 77-03-01 · published Feb 16, 1977, effective Feb 16, 1977
Twin Commander Aircraft LLC Airplanes
AD 76-18-11 · published Feb 18, 1977, effective Feb 18, 1977
The Boeing Company Airplanes
AD 74-10-09 · published Feb 21, 1977, effective Feb 21, 1977
The Boeing Company Airplanes
AD 77-02-02 · published Feb 22, 1977, effective Feb 22, 1977
The Boeing Company Airplanes
AD 77-04-02 · published Feb 22, 1977, effective Feb 21, 1977
Piper Aircraft Inc. Airplanes
AD 77-03-04 · published Feb 14, 1977, effective Feb 14, 1977
Bell Helicopter Textron, Inc. Helicopters
AD 77-04-06 · published Feb 17, 1977, effective Aug 23, 1979
Airbus Helicopters Deutschland GmbH Helicopters
AD 74-20-09 · published Feb 25, 1977, effective Feb 25, 1977
Sikorsky Aircraft Corporation Helicopters
AD 77-02-03 · published Feb 9, 1977, effective Feb 9, 1977
General Electric Company Engines
AD 75-05-06 · published Feb 24, 1977, effective Feb 24, 1977
Pratt & Whitney Division Engines
AD 77-03-06 · published Feb 25, 1977, effective Feb 25, 1977
Pratt & Whitney Division Engines
