Airworthiness Directive · Amendment 39-9133 · The Boeing Company Airplanes
The Boeing Company Airplanes
This AD applies to The Boeing Company DC-9-11, DC-9-12, DC-9-13, DC-9-14, DC-9-15, DC-9-15F, DC-9-21, DC-9-31, DC-9-32, DC-9-32 (VC-9C), DC-9-32F, DC-9-32F (C-9A), DC-9-32F (C-9B), DC-9-33F, DC-9-34, DC-9-34F, DC-9-41, DC-9-51.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-9-10, -20, -30, -40, and -50 series airplanes, and Model C-9 (military) airplanes, that requires replacement of the engine nose cowl attaching bolts and the installation of bearing plates on the nose cowl attach ring. This amendment is prompted by incidents in which the nose cowl separated from the airplane due to the elongation and/or breakout of the nose cowl's attachment ring holes, and failure of the attaching bolts. The actions specified by this AD are intended to prevent separation of the engine nose cowl from the airplane, which could result in damage to the airplane structure or could present a hazard to persons or property on the ground.
