# NTSB investigations: Franklin 6A4150 series, NH

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 ERA13LA327](https://openairdocs.org/ntsb/ERA13LA327.md): Univair 108-1 · Tuftonboro, NH · Accident · Minor injuries · Limited investigation · Final report · Jul 17, 2013 · N8721K · Substantial damage
  > Maintenance personnel’s failure to remove circumferential gouges in the aft radius of the R2 rod journal on the crankshaft during its last engine overhaul, which resulted in the fatigue failure of the crankshaft and a subsequent total loss of engine power.
- [NTSB NYC77DNC19](https://openairdocs.org/ntsb/NYC77DNC19.md): Stinson 108-1 · Salem, NH · Accident · Minor injuries · Closed · Jan 23, 1977 · N8874K · Substantial damage
- [NTSB NYC70D0017](https://openairdocs.org/ntsb/NYC70D0017.md): Stinson 108 · Wolfeboro, NH · Accident · No injuries · Closed · Jun 18, 1969 · N97699 · 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" = 'NH' 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 ('27024'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=27024&state=NH

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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.