Summary
This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain Boeing Model 737- 200 and -200C airplanes, that currently requires installation of fail- safe straps onto the engine inlet attach ring of the nose cowl. This action would require repetitive inspections to detect cracking of the attach ring of the nose cowl, and replacement of cracked attach rings. Replacement with a certain attach ring, if accomplished, would terminate the requirement to inspect the attach ring repetitively. This proposal is prompted by the development of an improved attach ring. The actions specified by the proposed AD are intended to prevent cracking of the attach ring of the nose cowl, which could result in separation of the nose cowl from the engine following failure of a turbine blade.