# NTSB investigations: Franklin 6V4 series, OH

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 ATL87DEI05](https://openairdocs.org/ntsb/ATL87DEI05.md): Bell 47G-2 · Lisbon, OH · Accident · Minor injuries · Final report · Jun 14, 1987 · N984B · Substantial damage
  > The helicopter rolled over as it was lifting off from a transport trailer. A post-crash exam revealed that the left rear tie-down strap on the trailer was wrapped around one of the helicopter skids. The ground crewman believed he had removed all of the straps…
- [NTSB ATL86FEI07](https://openairdocs.org/ntsb/ATL86FEI07.md): Bell 47G2 · Lisbon, OH · Accident · 1 fatal · Final report · Jun 26, 1986 · N984B · Minor damage
  > The aerial application helicopter was being serviced by a chemical truck that was parked adjacent to the acft. The acft engine was at high idle with the main rotor turning at 250 RPM. The ground crewman jumped off the side of the chemical truck into the main…
- [NTSB CHI82DA176](https://openairdocs.org/ntsb/CHI82DA176.md): Bell 47G-1 · Cincinnati, OH · Accident · Minor injuries · Final report · May 20, 1982 · N141B · Substantial damage
  > The fore and aft cyclic control linkage tube became disconnected in flight. An emergency descent, using collective "s" turns to reduce airspeed was performed. The pilot intentionally collided with trees during the forced landing to cushion the fall.…
- [NTSB CHI74FEK26](https://openairdocs.org/ntsb/CHI74FEK26.md): Bell 47D1 · Circleville, OH · Accident · No injuries · Closed · May 21, 1974 · N157B · Substantial damage
- [NTSB CHI73DEI14](https://openairdocs.org/ntsb/CHI73DEI14.md): Bell 47G · Oregon, OH · Accident · No injuries · Closed · Aug 27, 1972 · N7895B · 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" = 'OH' 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 ('27033'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=27033&state=OH

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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.