ADs published in April 1957

ADs published in April 1957

8 Airworthiness Directives: 3 airplane, 2 rotorcraft, 2 engine, 1 propeller.

Airplane

AD 57-08-06 · published 1957

Vickers-Armstrongs (Aircraft Limited) Airplanes

Vickers-Armstrongs (Aircraft Limited) Airplanes

AD 56-27-03 · published Apr 11, 1957

Piper Aircraft Inc. Airplanes

Piper Aircraft Inc. Airplanes

AD 57-09-01 · published 1957

Twin Commander Aircraft LLC Airplanes

Twin Commander Aircraft LLC Airplanes

Rotorcraft

AD 57-08-01 · published 1957

Scotts-Bell 47 Inc Helicopters

Scotts-Bell 47 Inc Helicopters

AD 57-08-02 · published 1957

Scotts-Bell 47 Inc Helicopters

Scotts-Bell 47 Inc Helicopters

Engine

AD 57-08-07 · published 1957

Curtiss-Wright/Marquette, Inc. Engines

Curtiss-Wright/Marquette, Inc. Engines

AD 56-26-03 · published Apr 11, 1957

Pratt & Whitney Division Engines

Pratt & Whitney Division Engines

Propeller

AD 57-08-04 · published 1957

Hartzell Propeller, Inc. Propellers

Hartzell Propeller, Inc. Propellers