# NTSB investigations: CFM International CFM56-7B24/3 series: Turbulence encounter

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB DCA25LA126](https://openairdocs.org/ntsb/DCA25LA126.md): Boeing 737-7H4 · Hacienda Heights, CA · Accident · Serious injuries · Class 4 · Limited · Final report · Feb 14, 2025 · N939WN · No damage
  > The airplane’s encounter with moderate turbulence during descent, which resulted in serious injury to a flight attendant.
- [NTSB DCA23LA086](https://openairdocs.org/ntsb/DCA23LA086.md): Boeing 737 · Denver, CO · Accident · Serious injuries · Class 4 · Limited · Final report · Nov 30, 2022 · N946WN · No damage
  > The flight’s encounter with mechanical turbulence.
- [NTSB DCA19CA075](https://openairdocs.org/ntsb/DCA19CA075.md): Boeing 737 · Bluefields, Nicaragua · Accident · Serious injuries · Class 4 · Data collection · Final report · Feb 5, 2019 · N852NN · No damage
  > An inadvertent encounter with clear air turbulence.
- [NTSB DCA11CA116](https://openairdocs.org/ntsb/DCA11CA116.md): Boeing 737 7H4 · Cape Coral, FL · Accident · Serious injuries · Data collection · Final report · Sep 6, 2011 · N936WN · No damage
  > An encounter with convective turbulence during the descent.

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('13074')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '360'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/360/cases?engine=13074

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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.