Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 757-200 and - 200PF series airplanes. This proposal would require repetitive detailed visual inspections to detect loose fuse pins in the outboard beam attachment and forward trunnion support on the main landing gear (MLG) and to detect corrosion on the structure adjacent to the fuse pin; and corrective actions, if necessary. This proposal also would require eventual replacement of the fuse pins with new corrosion resistant steel (CRES) fuse pins, which would constitute terminating action for the repetitive inspections. This proposal is prompted by a report of damaged fuse pins caused by corrosion. The actions specified by the proposed AD are intended to prevent corroded fuse pins, which could result in the MLG separating from the wing, and consequent damage to the airplane and possible rupture of the wing fuel tank.