# Vibration

- Type: NTSB finding subsection
- Path: [Environmental issues](https://openairdocs.org/ntsb-findings/03) › [Task environment](https://openairdocs.org/ntsb-findings/0304) › [Physical workspace](https://openairdocs.org/ntsb-findings/030410) › Vibration
- NTSB code: 03041045
- Cases: 1
- In the probable cause: 1
- Fatal cases: 1
- All cases: https://openairdocs.org/ntsb-findings/03041045/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/03041045/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/03041045

## Cases per year (in the probable cause / all)

- 2016: 1 / 1

## Defining events in these cases

- [Aircraft structural failure](https://openairdocs.org/ntsb-events/337): 1 cases

## Aircraft models (registry)

- [Bell Helicopter Textron 525](https://openairdocs.org/model/bell-helicopter-textron-525): 1 cases

## Other findings in the same cases

- [Equip certification/testing](https://openairdocs.org/ntsb-findings/04012015) (Organizational issues): 1 cases
- [Interface design](https://openairdocs.org/ntsb-findings/04011030) (Organizational issues): 1 cases
- [Policy/procedure development](https://openairdocs.org/ntsb-findings/04011025) (Organizational issues): 1 cases
- [Equipment design](https://openairdocs.org/ntsb-findings/04011010) (Organizational issues): 1 cases
- [Use of equip/system](https://openairdocs.org/ntsb-findings/02063015) (Personnel issues): 1 cases
- [Lack of action](https://openairdocs.org/ntsb-findings/02041030) (Personnel issues): 1 cases
- [Prop/rotor parameters](https://openairdocs.org/ntsb-findings/01062052) (Aircraft): 1 cases
- [Main rotor blade system](https://openairdocs.org/ntsb-findings/01046210) (Aircraft): 1 cases
- [Data recorders (flight/maint)](https://openairdocs.org/ntsb-findings/01023130) (Aircraft): 1 cases
- [Flight control system, general](https://openairdocs.org/ntsb-findings/01022700) (Aircraft): 1 cases

## Newest cases

- [NTSB DCA16FA199](https://openairdocs.org/ntsb/DCA16FA199), Jul 6, 2016: Bell 525 (N525TA), Italy, TX, destroyed, 2 fatal. Probable cause: A severe vibration of the helicopter that led to the crew's inability to maintain sufficient rotor rotation speed (Nr), leading to excessive main rotor blade flapping, subsequent main rotor blade…

NTSB has coded findings and defining events since 2008; earlier cases used its older occurrence and cause codes and aren't counted.

Findings: https://openairdocs.org/ntsb-findings.md. Defining events: https://openairdocs.org/ntsb-events.md. Phases of flight: https://openairdocs.org/ntsb-phases.md. Every investigation, filtered by finding, event, phase, state, year or model: https://openairdocs.org/ntsb.md (for example ?state=MI&fatal=1).

NTSB's definitions: Accident and incident, 49 CFR 830.2 (https://www.ecfr.gov/current/title-49/subtitle-B/chapter-VIII/part-830/subpart-A/section-830.2), CICTT occurrence categories (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/OccurrenceCategoryDefinitions.pdf), CICTT phases of flight (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/PhaseofFlightDefinitions.pdf), and NTSB coding manual, before 2008 (PDF) (https://www.ntsb.gov/GILS/Documents/codman.pdf). NTSB publishes no definitions for its findings, only their names.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.