Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 767-200 and 767-300 series airplanes. This proposal would require modification of the installation of the aft pressure bulkhead-to-floor insulation blankets. This action is necessary to avoid interference with venting during a rapid decompression in the bulk cargo compartment; such interference could result in damage to the floor structure as well as damage to certain control cables leading to the empennage, leading to reduced controllability of the airplane. This action is intended to address the identified unsafe condition.