Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain British Aerospace Model 4100 series airplanes. This proposal would require replacement of the stringer joint pieces at the left side of the fuselage with new, improved parts. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent the fuselage structure at the stringer joint at station 130 on the left side of the airplane from cracking, which could result in rapid decompression of the airplane at the forward fuselage area.