Summary
This document proposes adopting a new airworthiness directive (AD) for robinson Helicopter Company (Robinson) Model R44 and R44 II helicopters that have a certain seat belt buckle (buckle) assembly installed. The AD would require removing the buckle assembly and the buckle assembly spacer, and replacing them with airworthy parts. This proposal is prompted by an accident in which a seat belt failed, and also by reports of cracking in the buckle assembly stainless support strap (support strap). The actions specified by the proposed AD are intended to prevent cracking in the support strap and failure of a seat belt.