# NTSB investigations: Robinson Helicopter R44 II, WI

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 CEN21LA349](https://openairdocs.org/ntsb/CEN21LA349.md): Robinson Helicopter R44 II · Randolph, WI · Accident · Serious injuries · Class 4 · Limited · Final report · Jul 31, 2021 · N285RG · Substantial damage
  > The pilot’s failure to maintain clearance from power lines during a low-level aerial application flight.
- [NTSB CEN21LA021](https://openairdocs.org/ntsb/CEN21LA021.md): Robinson Helicopter R44 II · Washington, WI · Accident · No injuries · Class 4 · Limited · Final report · Oct 18, 2020 · N31136 · Substantial damage
  > The pilot’s failure to maintain lateral control during a hover and improper recovery action after the helicopter contacted the ground, which resulted in a dynamic rollover sequence and an impact with terrain.
- [NTSB GAA17CA070](https://openairdocs.org/ntsb/GAA17CA070.md): Robinson Helicopter R44 · Stone Lake, WI · Accident · Minor injuries · Data collection · Final report · Nov 12, 2016 · N744JS · Substantial damage
  > The pilot’s failure to maintain lateral control while in a hover and the helicopter’s subsequent impact with a tree.
- [NTSB CEN12LA573](https://openairdocs.org/ntsb/CEN12LA573.md): Robinson Helicopter R44 II · Belgium, WI · Accident · No injuries · Limited investigation · Final report · Aug 10, 2012 · N144DZ · Substantial damage
  > The pilot’s failure to maintain control of the helicopter while landing in gusting wind conditions, which resulted in a hard landing.
- [NTSB CHI08FA293](https://openairdocs.org/ntsb/CHI08FA293.md): Robinson R44 II · Kenosha, WI · Accident · 2 fatal · Field investigation · Final report · Sep 21, 2008 · N999ZD · Destroyed
  > The pilots failure to maintain clearance from terrain resulting in an in-flight collision with a house. Contributing to the accident was the night instrument meteorological conditions (IMC) and the pilot's lack of experience of flying in IMC.

## 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" = 'WI' 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=WI

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