# Final NTSB investigations: Allison 250-C18

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 CEN16LA182](https://openairdocs.org/ntsb/CEN16LA182.md): Bell 47G 3B 1 · Portia, AR · Accident · 1 fatal · Limited investigation · Final report · May 13, 2016 · N48316 · Substantial damage
  > The pilot's decision to perform a sliding takeoff from the elevated platform, which resulted in a dynamic rollover when the right skid plate caught on a protruding screw. Contributing to the accident was the pilot's failure to adequately inspect the landing…
- [NTSB NYC95LA147](https://openairdocs.org/ntsb/NYC95LA147.md): Bell 47G-3B-1 · Hammonton, NJ · Accident · 1 fatal · Limited investigation · Final report · Jul 10, 1995 · N48316 · Destroyed
  > failure of the collective yoke bearing, which resulted in an uncontrolled descent and collision with trees. A factor relating to the accident was: the manufacturer's inadequate inspection interval of the yoke bearing.
- [NTSB NYC84LA055](https://openairdocs.org/ntsb/NYC84LA055.md): Bell 47-G3B1 · Dummerston, VT · Accident · No injuries · Limited investigation · Final report · Dec 18, 1983 · N48316 · Substantial damage
  > The plt initiated a practice autorotation from about 600 ft AGL. Airspeed was about 55 KTS with low m/r RPM due to low gross weight. A moderate flare was initiated in an effort to increase rotor RPM, reducing the airspeed to 40 KTS. However, the application…

## 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."completionStatus" = 'Completed'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03075'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03075&status=final

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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.