# NTSB investigations: Bell 47D1, LA

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 FTW98LA144](https://openairdocs.org/ntsb/FTW98LA144.md): Bell 47D1 · Jeanerette, LA · Accident · Minor injuries · Limited investigation · Final report · Mar 11, 1998 · N13012 · Substantial damage
  > The in-flight disconnect of the rotating scissors due to the separation of its hinge bolt.
- [NTSB FTW91LA126](https://openairdocs.org/ntsb/FTW91LA126.md): Bell 47D-1 · Provencal, LA · Accident · No injuries · Limited investigation · Final report · Jul 24, 1991 · N3575 · Substantial damage
  > Fuel leakage from the fuel drain valve. A factor was the inaccessibility of suitable terrain for fored landing.
- [NTSB FTW91DRD05](https://openairdocs.org/ntsb/FTW91DRD05.md): Bell 47-D1 · Sun, LA · Accident · No injuries · Final report · May 26, 1991 · N339MC · Substantial damage
  > The total loss of power for undetermined reasons and the failure of the pilot to maintain rotor RPM. A factor was the lack of suitable terrain.

## 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" = 'LA' 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 ('1180802'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=1180802&state=LA

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