# NTSB investigations: Franklin 6V4 series: Roll over

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 FTW96LA192](https://openairdocs.org/ntsb/FTW96LA192.md): Bell 47D1 · Ardmore, OK · Accident · No injuries · Limited investigation · Final report · Apr 26, 1996 · N5226 · Substantial damage
  > the student's inadvertent dynamic rollover, and inadequate supervision by the flight instructor.
- [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 SEA83LA069](https://openairdocs.org/ntsb/SEA83LA069.md): Continental Copters Mkiii · Pasco, WA · Accident · No injuries · Limited investigation · Final report · Apr 1, 1983 · N73865 · Substantial damage
  > While repositioning the helicopter from the ground onto a trailer the acft rolled over when the right skid caught onto the trailer.
- [NTSB FTW82DA073](https://openairdocs.org/ntsb/FTW82DA073.md): Bell 47G · Dallas, TX · Accident · No injuries · Final report · Feb 28, 1982 · N1773 · Substantial damage
  > The pilot attempted to land on a narrow flatbed trailer. He stated that he encountered some buffeting from the wind funneling between two hangars. On his third attempt to position the helicopter on the trailer, the right skid slipped off. The main rotor…

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('27033')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 380))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=27033&occurrence=380

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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.