# NTSB investigations: Allison 250 SER 250HP, 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 CEN25LA298](https://openairdocs.org/ntsb/CEN25LA298.md): Bell 47G · Assumption, MN · Accident · No injuries · Class 4 · Limited · Final report · Jul 31, 2025 · N102SH · Substantial damage
  > A total loss of engine power due to fuel starvation, which resulted from attitude-inducing unporting of the fuel.
- [NTSB CEN10LA431](https://openairdocs.org/ntsb/CEN10LA431.md): Bell 47G-4A · Rochester, MN · Accident · 1 fatal · Limited investigation · Final report · Jul 24, 2010 · N124SH · Substantial damage
  > The total loss of engine power due to a high-cycle fatigue fracture of a first-stage compressor blade. The reason for the fracture could not be determined during postaccident examination.
- [NTSB MKC89LA188](https://openairdocs.org/ntsb/MKC89LA188.md): Bell 206B · Park Rapids, MN · Accident · No injuries · Limited investigation · Final report · Aug 26, 1989 · N2168S · Substantial damage
  > The pilot misjudged the clearance between the helicopter and the power line. The power line (transmission wire) was considered to be a contributing factor.

## 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 ('03002', '03003'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03002&state=MN

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