Airworthiness Directive · Amendment 39-12206 · Boeing Model 757-200 and -300 Series Airplanes
Boeing Model 757-200 and -300 Series Airplanes
Model 757-200 series airplanes as listed in Boeing Alert Service Bulletin 757-32A0135, Revision 1; and Model 757-300 series airplanes as listed in Boeing Alert Service Bulletin 757-32A0138, Revision 1; both dated November 30, 2000; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 757-200 and -300 series airplanes, that requires repetitive clearing of the drain passage at the aft end of the main landing gear (MLG) truck beam to ensure moisture and contaminants within the truck beam can properly drain; and, for certain airplanes, an internal inspection of the truck beam to detect discrepancies, and follow-on actions. This amendment is prompted by reports of fracture of MLG truck beams. The actions specified by this AD are intended to prevent stress corrosion cracking, leading to fracture of a MLG truck beam during ground operations, which could result in either reduced controllability of the airplane or a fire.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
