# NTSB investigations, SD: Unknown or undetermined

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 CEN26LA332](https://openairdocs.org/ntsb/CEN26LA332.md): Piper PA18 · Karinen, SD · Accident · Serious injuries · Class 3 · Limited · Preliminary report · Sep 17, 2026 · N3879Z · Substantial damage
  > On September 17, 2026, about 0710 mountain daylight time, a Piper PA18-150 airplane, N3879Z, was substantially damaged when it was involved in an accident near Karinen, South Dakota. The pilot was seriously injured. The airplane was operated as a Title 14…
- [NTSB CEN26LA296](https://openairdocs.org/ntsb/CEN26LA296.md): Para-Ski VX · Westport, SD · Accident · 1 fatal · Class 3 · Limited · Preliminary report · Aug 20, 2026 · C-IFBY · Substantial damage
  > On August 19, 2026, about 1920 central daylight time, a Para-Ski VX powered parachute, C-IFBY, was substantially damaged when it was involved in an accident near Westport, South Dakota. The pilot sustained serious injuries, passenger 1 sustained fatal…
- [NTSB CEN22LA313](https://openairdocs.org/ntsb/CEN22LA313.md): Piper PA-24-260 · Rapid City, SD · Accident · No injuries · Class 3 · Limited · Final report · Jul 11, 2022 · N478WT · Substantial damage
  > A total loss of engine power for reasons that could not be determined because the airplane was unavailable for examination.
- [NTSB CEN20LA215](https://openairdocs.org/ntsb/CEN20LA215.md): Mitsubishi MU2B · Sioux Falls, SD · Accident · 1 fatal · Class 3 · Limited · Final report · Jun 7, 2020 · N44MX · Destroyed
  > The pilot’s failure to maintain control of the airplane during takeoff for reasons that could not be determined.
- [NTSB CEN12FA001](https://openairdocs.org/ntsb/CEN12FA001.md): Robinson Helicopter R66 · Philip, SD · Accident · 1 fatal · Field investigation · Final report · Oct 1, 2011 · N266CY · Destroyed
  > The in-flight separation of the main rotor mast following a mast bumping event. The reason for the mast bumping event could not be determined due to postaccident 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" = 'SD' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '000' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/000/sequence?state=SD

---
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.