Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 777 series airplanes. This proposal would require replacement of nuts on the clevis assemblies that support the auxiliary tracks of the inboard leading edge slats. This action is necessary to prevent loose or missing nuts on the clevis assemblies, which could cause the inboard leading edge slats to be loose or in an incorrect position and result in partial or total failure or loss of the slats. This action is intended to address the identified unsafe condition.