# NTSB investigations: Lycoming TVO-435-GIA, SD

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 CEN18LA306](https://openairdocs.org/ntsb/CEN18LA306.md): Bell 47G 3B · Custer, SD · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 2, 2018 · N347BH · Substantial damage
  > The pilot’s mismanagement of rotor RPM and subsequent forced landing on uneven terrain which led to a dynamic rollover.
- [NTSB DEN85LA144](https://openairdocs.org/ntsb/DEN85LA144.md): Continental Copters Tomcat Mark 5A/OH13H · Freeman, SD · Accident · Minor injuries · Limited investigation · Final report · May 29, 1985 · N9081T · Substantial damage
  > The plt said he had completed 4 to 5 swath runs (crop spraying mission). During a turning manuever with a left quatering tail wind, full left pedal,full pwr,the helicopter had a high sink rate until grd impact.
- [NTSB MKC70I0081](https://openairdocs.org/ntsb/MKC70I0081.md): Bell 47G3B1 · Hill City, SD · Incident · No injuries · Closed · Aug 2, 1969 · N7924S · Minor damage
- [NTSB MKC69F0174](https://openairdocs.org/ntsb/MKC69F0174.md): Bell 47G3B1 · Custer, SD · Accident · Minor injuries · Closed · Aug 18, 1968 · N6214N · Destroyed

## 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" = 'SD' 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 ('41526'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41526&state=SD

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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.