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Bell 525 Relentless In-Flight Breakup

NTSB Safety Studies · Safety study · SS-19/01 · Published 2019-09-17 · National Transportation Safety Board · 1 author

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Abstract and citation only, verbatim from NTSB Safety Studies; full text lives there. All credit to the authors and National Transportation Safety Board.

Abstract

Investigation report and safety study on the 6 July 2016 in-flight breakup of a Bell 525 Relentless helicopter prototype during a developmental flight test near Italy, Texas. Examines vibration-induced pilot-output and biodynamic feedback that caused divergent control oscillations.

Author

  • National Transportation Safety Board NTSB

Keywords

  • rotorcraft
  • flight test
  • pilot-induced oscillation

Citation

National Transportation Safety Board (2019). Bell 525 Relentless In-Flight Breakup. National Transportation Safety Board. NTSB Safety Studies ID SS-19/01. https://www.ntsb.gov/investigations/AccidentReports/Pages/AAR1903.aspx ↗