# NTSB investigations: Allison 250 SER 400HP: 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 WPR22LA221](https://openairdocs.org/ntsb/WPR22LA221.md): Bell 206B · Stockton, CA · Accident · No injuries · Class 3 · Limited · Final report · Jun 17, 2022 · N90326 · Substantial damage
  > Tail rotor blade impact with an unidentified object, which resulted in the loss of control and subsequent rollover of the helicopter.
- [NTSB GAA22WA099](https://openairdocs.org/ntsb/GAA22WA099.md): Hughes 369HS · Panama City, Panama · Incident · No injuries · Class 5 · Foreign · Feb 7, 2022 · N9113Q · Minor damage
- [NTSB ERA19WA176](https://openairdocs.org/ntsb/ERA19WA176.md): Bell 206 · La Vega, Dominican Republic · Accident · 2 fatal · Foreign investigation · May 21, 2019 · N9956K · Substantial damage
- [NTSB CEN10FA509](https://openairdocs.org/ntsb/CEN10FA509.md): Bell Helicopter Textron 206L-1 · Walnut Grove, AR · Accident · 3 fatal · Field investigation · Final report · Aug 31, 2010 · N62AE · Substantial damage
  > The pilot’s loss of aircraft control, due to spatial disorientation, resulting in the in-flight separation of the main rotor and tail boom.

## 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 ('03013', '03012')
    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" = '000'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/000/cases?engine=03013

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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.