# NTSB investigations: Franklin 6V4 series, AZ

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 WPR21LA077](https://openairdocs.org/ntsb/WPR21LA077.md): Bell 47D · Marana, AZ · Accident · Minor injuries · Class 4 · Limited · Final report · Jan 1, 2021 · N74823 · Substantial damage
  > The pilot's failure to maintain helicopter control, which resulted in a hard landing.
- [NTSB LAX85LA249](https://openairdocs.org/ntsb/LAX85LA249.md): Hiller 12-C · Casa Grande, AZ · Accident · No injuries · Limited investigation · Final report · May 9, 1985 · N38767 · Substantial damage
  > The plt was demonstrating autorotations to a touchdown on a dirt rwy into a 5 kt headwind. On the final landing he said that the touchdown felt the same as others he had done. Speed at touchdown was 15 mph and the helicopter slid forward in a straight line…
- [NTSB LAX81FUJ85](https://openairdocs.org/ntsb/LAX81FUJ85.md): Bell 47D1 · Poston, AZ · Accident · Minor injuries · Closed · Aug 10, 1981 · N8060E · Substantial damage
- [NTSB LAX77DUK02](https://openairdocs.org/ntsb/LAX77DUK02.md): Bell 47D1 · Poston, AZ · Accident · No injuries · Closed · Sep 14, 1977 · N8060E · Substantial damage
- [NTSB LAX77FUJ19](https://openairdocs.org/ntsb/LAX77FUJ19.md): Bell 47D1 · Parker, AZ · Accident · No injuries · Closed · Jan 10, 1977 · N8060E · Substantial damage
- [NTSB LAX74DUJ24](https://openairdocs.org/ntsb/LAX74DUJ24.md): Hiller Acft UH-12B · Tucson, AZ · Accident · No injuries · Closed · Sep 28, 1973 · N7299 · Substantial damage
- [NTSB LAX71DUJ19](https://openairdocs.org/ntsb/LAX71DUJ19.md): Bell 47G · Queen Creek, AZ · Accident · No injuries · Closed · Jul 27, 1970 · N5237A · 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" = 'AZ' 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=AZ

---
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.