# NTSB investigations: Allison 250-C20 series, 2015

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 ERA16LA030](https://openairdocs.org/ntsb/ERA16LA030.md): Hughes 369D · Marion, SC · Accident · No injuries · Limited investigation · Final report · Oct 30, 2015 · N920JP · Substantial damage
  > A momentary jam in the tail rotor control system from an undetermined source, resulting in a torsional fracture of the tail rotor control torque tube and a loss of helicopter control.
- [NTSB ERA16LA015](https://openairdocs.org/ntsb/ERA16LA015.md): Bell 206L 3 · Dickinson, AL · Accident · No injuries · Limited investigation · Final report · Oct 15, 2015 · N206CJ · Substantial damage
  > The improper installation by company maintenance personnel of the securing hardware of a tail rotor driveshaft section, which resulted in that section of tail rotor driveshaft disconnecting and a complete loss of tail rotor thrust.
- [NTSB CEN15LA423](https://openairdocs.org/ntsb/CEN15LA423.md): Bell 206B · Woodville, TX · Accident · Serious injuries · Limited investigation · Final report · Sep 24, 2015 · N648CA · Substantial damage
  > The loss of engine power due to water contamination in the fuel system. Contributing to the accident were the pilot’s inadequate preflight inspection of the fuel tanks and the operator’s inadequate inspection of the fuel supply truck that did not detect water…
- [NTSB ERA15LA337](https://openairdocs.org/ntsb/ERA15LA337.md): Mcdonnell Douglas Helicopter 369E · New Smyrna Beach, FL · Accident · Serious injuries · Limited investigation · Final report · Sep 3, 2015 · N16056 · Substantial damage
  > The pilot’s inadequate visual lookout and failure to maintain clearance from trees while maneuvering at low altitude.
- [NTSB GAA15CA102](https://openairdocs.org/ntsb/GAA15CA102.md): Bell 206 - B11 · Caledonia, MI · Accident · No injuries · Data collection · Final report · May 29, 2015 · N206ED · Substantial damage
  > A loss of tail rotor effectiveness while maneuvering at low altitude, resulting in a collision with trees.

## 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 year(c."eventDate") = 2015
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03020'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03020&year=2015

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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.