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Naval Systems that Go in Harm's Way

H-60 Seahawk Helicopter Dynamic Components Redesign Study


The redesign study will evaluate methods of improving the Sikorsky Aircraft Corporation (SAC) H-60 Seahawk helicopter’s dynamic component’s service life. The focus of the evaluation will be on removal causes that include corrosion, wear, maintenance damage, and review of existing aircraft maintenance processes.


MH-60(R/S) dynamic component fatigue lives are dramatically lower than that of the legacy SH-60B due to increased gross weights and differences in mission profiles and usage. These low fatigue lives greatly increase the projected Operations and Support (O&S) costs. Because of this, PMA-299 has undertaken a three-phased program to increase both the dynamic component life limits and their resistance to corrosion and wear. Phase I addressed the methodology for fatigue life calculations that take advantage of a larger loads database. This phase is complete. Phase II is a redesign study that evaluates selected dynamic components that do not have acceptable lives, as recalculated and reported in Phase I. Phase II will investigate the reasons for replacement and will provide preliminary recommendations for potential redesign of the selected components. Finally, Phase III will focus on implementing recommendations identified in Phase II.

Technical Approach

The project team will identify H-60 Seahawk dynamic components that do not have an acceptable life, investigate reasons for replacement and provide recommendations for potential redesign of the selected components.


It is anticipated that the results of this Dynamic Component Redesign Study will be to reduce forced component removal rate to achieve higher mission availability.  Additional benefits are to reduce fleet support costs by reducing:

  • Spares required
  • Pack-up kits (PUK)
  • Overhaul costs
  • Maintenance hours/flight hour.


The results and recommendation of this study will be documented in a final report. Phase III, of the three-phase approach undertaken by NAVAIRSYSCOM, will focus on implementing the results and recommendations outlined in this final report.




Dr. Margery Hoffman
MH-69R Air Vehicle Engineering Lead