Airworthiness Directive · Amendment 39-8973 · The Boeing Company Airplanes
The Boeing Company Airplanes
This AD applies to The Boeing Company MD-11, MD-11F.
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 supersedes an existing airworthiness directive (AD), applicable to certain McDonnell Douglas Model MD-11 series airplanes, that currently requires inspections to verify the installation of shear pins, shear pin retainers, and shear pin retainer attaching parts in the aft end of the center pylon thrust link, and repair, if necessary. That AD was prompted by a report that both shear pins that attach the aft end of the center engine pylon thrust link to the tail pylon were missing. This amendment adds inspections to verify that the shear pin retainer attaching parts are tightened within specified limits; and adds a terminating modification for those inspections. This amendment also expands the applicability of the rule to include additional airplanes. The actions specified by this AD are intended to prevent structural damage to the engine mount structure, which could lead to loss of airplane components.
