Evaluating Analysis Methods for Legacy HUMS Data

The Canadian Search and Rescue (SAR) CH149 Cormorant helicopter, a variant of the AgustaWestland EH-101, entered service for Canada in 2002, equipped with a Health and Usage Monitoring System (HUMS). While HUMS continue to advance and provide increasingly refined solutions, HUMS-equipped aircraft procured before the maturation of these systems require consideration of novel approaches to maximize the benefit of legacy data. Continued regulatory compliance necessitates ongoing innovation and continuous improvement. On the CH149 Cormorant fleet, this is achieved primarily through the refinement of monitoring methods and the expansion of HUMS data in support of the CH149 fleet and the various methods that have been developed to address the limitations of the available HUMS data. Innovations have included developing novel methods for post-process analysis of HUMS data. These methods are leveraged against known fleet maintenance issues and evaluated for effectiveness.