# NTSB investigations: Robinson Helicopter R44 II, 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 CEN25LA105](https://openairdocs.org/ntsb/CEN25LA105.md): Robinson Helicopter R44 II · Edgemont, SD · Accident · Serious injuries · Class 3 · Limited · Final report · Feb 27, 2025 · N6555C · No damage
  > The pilot’s failure to properly identify the proper anchor point for the supplemental harness and the crew’s incorrect use of the restraint system structure as an anchor point, which resulted in the separation of the structure.
- [NTSB GAA15CA196](https://openairdocs.org/ntsb/GAA15CA196.md): Robinson Helicopter R44 II · Forest City, SD · Accident · No injuries · Data collection · Final report · Jul 2, 2015 · N824DK · Substantial damage
  > The pilot's failure to monitor the flight environment for adequate terrain/obstacle clearance during takeoff, which resulted in the inflight collision with power transmission line wires.
- [NTSB CEN13LA228](https://openairdocs.org/ntsb/CEN13LA228.md): Robinson Helicopter R44 II · Buffalo, SD · Accident · No injuries · Limited investigation · Final report · Apr 13, 2013 · N424DP · Substantial damage
  > The pilot’s failure to maintain adequate main rotor rpm while maneuvering at a low altitude in gusting wind conditions, which resulted in an emergency landing on uneven terrain.

## 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.aircraft_model_code IN ('7640122', '7640123'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=7640122&state=SD

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