# NTSB investigations: Franklin 6VS-335 series, IA

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 MKC89LA016](https://openairdocs.org/ntsb/MKC89LA016.md): Hiller UH-12C · Davenport, IA · Accident · No injuries · Limited investigation · Final report · Oct 26, 1988 · N57FD · Substantial damage
  > While demonstrating an autorotation touchdown, a tailboom strike was experienced. Damage was incurred to the tailboom, the tail rotor drive shaft, and one main rotor blade. The CFI said everthing felt normal during touchdown and believed the soft terrain…
- [NTSB MKC76FCD07](https://openairdocs.org/ntsb/MKC76FCD07.md): Bell H-13E · Collins, IA · Accident · Minor injuries · Closed · Aug 30, 1975 · N29WL · 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" = 'IA' 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 ('27040'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=27040&state=IA

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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.