Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 757-200 series airplanes. This proposal would require repetitive inspections for fatigue cracking of certain areas of the forward and aft frames of the cargo doors and repair, if necessary. This action is necessary to find and fix such cracking, which could lead to rapid depressurization of the airplane and result in reduced structural integrity of the cargo doorway. This action is intended to address the identified unsafe condition.