Airworthiness Directive · Amendment 39-15667 · McDonnell Douglas Model MD-90-30 Airplanes
McDonnell Douglas Model MD-90-30 Airplanes
Superseded. A later AD replaced this one: AD 2010-22-04. Comply with the one in force.
This AD applies to McDonnell Douglas Model MD-90-30 airplanes, certificated in any category; as identified in Boeing Alert Service Bulletin MD90-54A002, dated August 1, 2008.
We are adopting a new airworthiness directive (AD) for certain McDonnell Douglas Model MD-90-30 airplanes. This AD requires a detailed inspection for certain defects of the upper fasteners of the aft mount support fitting of the left and right engines and corrective actions if necessary. This AD results from reports of loose, cracked, or missing fasteners in the aft mount support fitting of the left and right engines. We are issuing this AD to detect and correct loose, cracked, or missing fasteners in the engine aft support mount fitting, which could lead to separation of the support fitting from the pylon, which could result in separation of the engine from the airplane.
Comply with this AD within the compliance times specified, unless already done.
Within 703 flight cycles after the effective date of this AD, do a detailed inspection for any defect (missing, loose, or damaged fasteners; incorrect gap between washers and structure or between fastener heads and structure; or incorrect torque of fastener nuts) of the upper fasteners of the aft mount support fitting of the left and right engines, and do all the applicable corrective actions before further flight, by accomplishing all of the applicable actions specified in the Accomplishment Instructions of Boeing Alert Service Bulletin MD90-54A002, dated August 1, 2008.
Actions done before the effective date of this AD in accordance with Boeing MOM 1-893882781-2, dated July 25, 2008, are acceptable for compliance with the requirements of paragraph (f) of this AD.
