# NTSB investigations: Robinson Helicopter R44 II, 2009

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 CEN10CA082](https://openairdocs.org/ntsb/CEN10CA082.md): Robinson Helicopter R44 II · Abilene, TX · Accident · No injuries · Data collection · Final report · Dec 18, 2009 · N442RS · Substantial damage
  > The pilot's failure to maintain directional control during the air taxi with shifting winds.
- [NTSB WPR09CA470](https://openairdocs.org/ntsb/WPR09CA470.md): Robinson Helicopter R44 II · Mt Charleston, NV · Accident · Minor injuries · Data collection · Final report · Sep 28, 2009 · N29LE · Destroyed
  > The pilot's failure to maintain aircraft control and terrain clearance while maneuvering at a low altitude above high terrain. Contributing to the accident was a downdraft and high density altitude.
- [NTSB WPR09LA460](https://openairdocs.org/ntsb/WPR09LA460.md): Robinson Helicopter R44 II · Valley Center, CA · Accident · Serious injuries · Limited investigation · Final report · Sep 20, 2009 · N4174P · Substantial damage
  > The failure of the engine’s camshaft due to fatigue of unknown origin.
- [NTSB ANC09LA098](https://openairdocs.org/ntsb/ANC09LA098.md): Robinson Helicopter R44 II · Central, AK · Accident · No injuries · Limited investigation · Final report · Sep 7, 2009 · N4186Y · Substantial damage
  > The pilot’s failure to maintain control of the helicopter after an in-flight encounter with a downdraft while landing. Contributing to the accident was the pilot’s inadequate evaluation of wind conditions.
- [NTSB WPR09LA411](https://openairdocs.org/ntsb/WPR09LA411.md): Robinson R44 · Tonopah, NV · Accident · Serious injuries · Limited investigation · Final report · Aug 21, 2009 · N19DV · Substantial damage
  > The pilot’s failure to maneuver the helicopter within its performance capabilities while at a low altitude in mountainous terrain and in high density altitude conditions.
- [NTSB ERA09LA421](https://openairdocs.org/ntsb/ERA09LA421.md): Robinson Helicopter R44 II · Dunedin, FL · Accident · No injuries · Limited investigation · Final report · Jul 24, 2009 · N645JC · Substantial damage
  > A partial loss of engine power for undetermined reasons.
- [NTSB ERA09LA410](https://openairdocs.org/ntsb/ERA09LA410.md): Robinson R44 · Silver Spring, PA · Accident · No injuries · Limited investigation · Final report · Jul 19, 2009 · N25VH · Substantial damage
  > The student pilot's inability to fully control the helicopter, during cruise and the resultant off-field hard landing.
- [NTSB WPR09LA312](https://openairdocs.org/ntsb/WPR09LA312.md): Robinson Helicopter R44 II · Lakeport, CA · Accident · No injuries · Limited investigation · Final report · Jun 25, 2009 · N515DG · Substantial damage
  > A loss of engine power while maneuvering for undetermined reasons.
- [NTSB ERA09CA337](https://openairdocs.org/ntsb/ERA09CA337.md): Robinson Helicopter R44 II · Meredith, NH · Accident · No injuries · Data collection · Final report · May 25, 2009 · N47GT · Substantial damage
  > The pilot’s failure to maintain control during landing.
- [NTSB WPR09CA224](https://openairdocs.org/ntsb/WPR09CA224.md): Robinson R44 · Cottonwood, AZ · Accident · No injuries · Data collection · Final report · May 3, 2009 · N441CB · Substantial damage
  > The pilot's inadequate visual lookout and failure to maintain clearance from wires.
- [NTSB CEN09CA270](https://openairdocs.org/ntsb/CEN09CA270.md): Robinson Helicopter R44 II · Kent, TX · Accident · No injuries · Data collection · Final report · Apr 23, 2009 · N518SJ · Substantial damage
  > The pilot's failure to maintain control of the helicopter.
- [NTSB WPR09CA105](https://openairdocs.org/ntsb/WPR09CA105.md): Robinson Helicopter R44 II · Bountiful, UT · Accident · Minor injuries · Data collection · Final report · Feb 1, 2009 · N944U · Substantial damage
  > The pilot's improper decision to fly at low altitude while maneuvering in mountainous terrain in a canyon and inadvertently exceeding the climb capability of the helicopter. Contributing to the accident were a high density altitude, mountainous terrain, and a…
- [NTSB WPR09FA076](https://openairdocs.org/ntsb/WPR09FA076.md): Robinson Helicopter R44 II · West Valley City, UT · Accident · Serious injuries · Field investigation · Final report · Jan 9, 2009 · N168SH · Substantial damage
  > The pilot’s inadvertent VFR flight into IMC conditions, which resulted in his spatial disorientation and loss of control of the helicopter. Also causal was the flight instructor’s delay in taking remedial action.

## 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 year(c."eventDate") = 2009
  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&year=2009

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