# NTSB investigations: Allison 250 series, MN

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 GAA16CA293](https://openairdocs.org/ntsb/GAA16CA293.md): Bell 47G · Hastings, MN · Accident · No injuries · Data collection · Final report · Jun 8, 2016 · N25LB · Substantial damage
  > The pilot's failure to attain a positive rate of climb during takeoff from a service truck, which resulted in an impact with terrain and substantial damage to the tail boom and fuselage.
- [NTSB CHI07LA277](https://openairdocs.org/ntsb/CHI07LA277.md): Bell 47G-5A · Anoka, MN · Accident · Minor injuries · Limited investigation · Final report · Aug 24, 2007 · N25LB · Substantial damage
  > The loss of helicopter pitch control for undetermined reasons during the aerial application maneuver and the pilot's inability to control the aircraft during the descent.. A contributing factor to the accident was the soft terrain.
- [NTSB CHI85LA254](https://openairdocs.org/ntsb/CHI85LA254.md): Bell 47G-4 · Lakeville, MN · Accident · No injuries · Limited investigation · Final report · Jun 26, 1985 · N3094G · Substantial damage
  > The acft was being landed on a trailer for transportation. Upon touchdown the right skid hooked on the landing guides and the helicopter rolled to the right side. The main rotor blades struck the ground, the left fuel tank ruptured and an explosion and fire…

## 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" = 'MN' 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 ('03014', '03019'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03014&state=MN

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