NTSB Safety Studies · Safety study

Bell 525 Relentless In-Flight Breakup

Published 2019-09-17 From National Transportation Safety Board 1 author

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Attribution

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Abstract

Verbatim from NTSB Safety Studies. Not paraphrased, not summarized.

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 ↗