# NTSB investigations: Bell 206-L4: Unknown or undetermined

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 WPR24FA132](https://openairdocs.org/ntsb/WPR24FA132.md): Bell 206-L4 · Anaconda, MT · Accident · 1 fatal · Class 3 · Field · Final report · Apr 26, 2024 · N988B · Destroyed
  > A total loss of engine power due to a loss of cooling oil to the turbine-to-compressor coupling shaft and subsequent fracture of the shaft at an altitude too low for the pilot to complete a successful autorotation. Contributing to the accident was carbon…
- [NTSB ERA23LA309](https://openairdocs.org/ntsb/ERA23LA309.md): Bell 206-L4 · Caldwell, OH · Accident · Serious injuries · Class 3 · Limited · Final report · Jul 23, 2023 · N482TJ · Substantial damage
  > The helicopter’s uncontrolled vertical descent and impact with terrain for reasons that could not be determined.
- [NTSB CEN14FA286](https://openairdocs.org/ntsb/CEN14FA286.md): Bell 206 L4 · South Timbalier Platform · Accident · 2 fatal · Field investigation · Final report · Jun 11, 2014 · N207MY · Destroyed
  > The pilot's loss of helicopter control for reasons that could not be determined based on the available information.
- [NTSB CEN09FA193](https://openairdocs.org/ntsb/CEN09FA193.md): Bell 206-L4 · Moundridge, KS · Accident · 1 fatal · Field investigation · Final report · Mar 8, 2009 · N863H · Substantial damage
  > Inflight collision with terrain for undetermined reasons.

## 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.aircraft_model_code IN ('1182110')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s.case_mkey = x.case_mkey AND s.aircrafts_position = x.position AND s."tier2Number" = '000' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent")))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/000/sequence?model=1182110

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