Airworthiness Directives; McDonnell Douglas Model MD-90-30 Airplanes

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.