Airworthiness Directive · Amendment 39-13462 · Aerospatiale Model ATR42 and ATR72 Series Airplanes
Aerospatiale Model ATR42 and ATR72 Series Airplanes
Model ATR42-200, -300, -320, and -500 series airplanes on which ATR Modification 5338 has not been done; and Model ATR72-101, -102, -201, -202, -211, -212, and -212A series airplanes on which ATR Modification 5337 has not been done; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Aerospatiale Model ATR42 and ATR72 series airplanes, that requires replacement of the swinging lever spacers in the left and right leg assemblies of the main landing gear with new, improved spacers. This action is necessary to prevent propagation of fatigue cracking, which could result in failure of the spacer base and could affect the symmetrical functioning of the braking system. Asymmetrical braking could result in the airplane overrunning the runway during takeoff or landing. This action is intended to address the identified unsafe condition.
