# NTSB investigations: Allison 250-C30 series, CO

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 CEN14FA122](https://openairdocs.org/ntsb/CEN14FA122.md): Bell 206L 3 · Silt, CO · Accident · 3 fatal · Field investigation · Final report · Jan 27, 2014 · N207DS · Destroyed
  > The pilot’s inadequate preflight planning for a low-level aerial surveillance flight of power transmission lines, which led to his being unaware of the crossing power line while flying toward the sun and his subsequent failure to maintain sufficient clearance…
- [NTSB CEN13LA310](https://openairdocs.org/ntsb/CEN13LA310.md): Bell Helicopter Textron 206L-1 · La Junta, CO · Accident · No injuries · Limited investigation · Final report · May 7, 2013 · N20Z · Substantial damage
  > The pilot's inadequate compensation for wind during low-altitude operations, which resulted in a loss of tail rotor effectiveness.
- [NTSB DEN02LA101](https://openairdocs.org/ntsb/DEN02LA101.md): Bell 206L-III · Canon City, CO · Accident · Serious injuries · Limited investigation · Final report · Aug 30, 2002 · N43GA · Destroyed
  > the pilot's failure to maintain clearance of a static wire, and the subsequent loss of aircraft control due to the main rotor pitch change tubes being severed.
- [NTSB FTW97LA217](https://openairdocs.org/ntsb/FTW97LA217.md): Bell 206L-3 · Weston, CO · Accident · No injuries · Limited investigation · Final report · Jun 12, 1997 · N207DS · Substantial damage
  > the pilot's improper in-flight planning/decision and failure to maintain adequate altitude and/or clearance from rising mountainous/hilly terrain. The unfavorable wind condition and low airspeed were related factors.
- [NTSB FTW94LA071](https://openairdocs.org/ntsb/FTW94LA071.md): Bell 206L-3 · Cascade, CO · Accident · No injuries · Limited investigation · Final report · Jan 20, 1994 · N3211K · Substantial damage
  > The pilot's improper in-flight planning which resulted in the aircraft's yaw performance being exceeded. A factor was the high density altitude.
- [NTSB DEN84LA093](https://openairdocs.org/ntsb/DEN84LA093.md): Bell 206L-3 · Lake City, CO · Accident · Minor injuries · Limited investigation · Final report · Feb 18, 1984 · N3893U · Substantial damage
  > The helicopter took off in marginal VMC conditions at close to conditions requiring maximum performance for takeoff. The plt attempted to hover at 90 percent RPM waiting he said 'for a breeze'. The hover stirred up snow causing a whiteout and loss of visual…

## 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."eventStateOrRegion" = 'CO' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03015'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03015&state=CO

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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.