# NTSB investigations: Bell 47D1, MA

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 NYC89DNE01](https://openairdocs.org/ntsb/NYC89DNE01.md): Bell 47D1 · Russell, MA · Accident · 1 fatal · Final report · Dec 2, 1988 · N163B · Destroyed
  > A pilot induced low rotor RPM condition, followed by blade flapping as the main rotor blade contacted the tail of the helicopter.
- [NTSB NYC72FNA41](https://openairdocs.org/ntsb/NYC72FNA41.md): Bell 47D · Accord, MA · Accident · Serious injuries · Closed · May 12, 1972 · N177B · Destroyed
- [NTSB NYC72FNA05](https://openairdocs.org/ntsb/NYC72FNA05.md): Bell 47D · Carver, MA · Accident · No injuries · Closed · Aug 4, 1971 · N177B · Substantial damage
- [NTSB NYC70F0049](https://openairdocs.org/ntsb/NYC70F0049.md): Bell 47D1 · Feeding Hlls, MA · Accident · No injuries · Closed · Jun 30, 1969 · N4250A · Destroyed

## 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" = 'MA' 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=MA

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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.