# NTSB investigations: Bell 47G, OK

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 FTW98FA306](https://openairdocs.org/ntsb/FTW98FA306.md): Bell 47G · Jones, OK · Accident · 2 fatal · Field investigation · Final report · Jul 10, 1998 · N12085 · Destroyed
  > The pilot's failure to maintain adequate clearance from the trees during a low altitude flight/maneuver.
- [NTSB FTW98FA238](https://openairdocs.org/ntsb/FTW98FA238.md): Bell 47G · Bixby, OK · Accident · 1 fatal · Field investigation · Final report · May 24, 1998 · N9954F · Substantial damage
  > The pilot's failure to maintain clearance from the power lines.
- [NTSB FTW94LA166](https://openairdocs.org/ntsb/FTW94LA166.md): Bell 47G · Sulphur, OK · Accident · No injuries · Limited investigation · Final report · May 18, 1994 · N933B · Substantial damage
  > The loss of engine power due to the failure of an engine accessory oil pump gear. A factor was the lack of suitable terrain for the autorotation.
- [NTSB FTW66A0087](https://openairdocs.org/ntsb/FTW66A0087.md): Bell 47G-2 · Billings, OK · Accident · No injuries · Closed · Apr 4, 1966 · N939B · Substantial damage

## 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" = 'OK' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('1181002'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=1181002&state=OK

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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.