# NTSB investigations: Robinson Helicopter R44 II: 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 CEN25LA116](https://openairdocs.org/ntsb/CEN25LA116.md): Robinson Helicopter R44 II · Chicago, IL · Accident · No injuries · Class 3 · Limited · Preliminary report · Mar 10, 2025 · N128AF · Substantial damage
  > On March 10, 2025, about 18:30 central daylight time, a Robinson Helicopter R44 II, N128AF was substantially damaged when it was involved in an accident near Chicago, Illinois. The pilot and both passengers were not injured. The helicopter was operated under…
- [NTSB WPR24FA200](https://openairdocs.org/ntsb/WPR24FA200.md): Robinson Helicopter R44 II · Bluestem, WA · Accident · 2 fatal · Class 3 · Field · Final report · Jun 19, 2024 · N323TT · Destroyed
  > The pilot’s failure to manage main rotor rpm during an autorotation, which resulted in a loss of helicopter control. Contributing to the accident was a loss of power for reasons that could not be determined.
- [NTSB CEN23LA306](https://openairdocs.org/ntsb/CEN23LA306.md): Robinson Helicopter R44 II · Pocahontas, IL · Accident · No injuries · Class 3 · Limited · Final report · Jul 14, 2023 · N62RK · Substantial damage
  > A reported loss of engine power for undetermined reasons.
- [NTSB CEN21LA369](https://openairdocs.org/ntsb/CEN21LA369.md): Robinson Helicopter R44 II · Wheeling, IL · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 11, 2021 · N4043B · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on available information.
- [NTSB WPR20FA013](https://openairdocs.org/ntsb/WPR20FA013.md): Robinson R44 · Las Vegas, NV · Accident · 2 fatal · Class 3 · Field · Final report · Oct 23, 2019 · N225JM · Substantial damage
  > An undetermined inflight event that resulted in the pilot performing an autorotation to uneven terrain for reasons that could not be determined due to the extent of impact damage.
- [NTSB WPR19FA188](https://openairdocs.org/ntsb/WPR19FA188.md): Robinson R44 · Hayward, CA · Accident · 1 fatal · Class 3 · Field · Final report · Jul 15, 2019 · N144TG · Substantial damage
  > The pilots’ loss of control during a low altitude maneuver for undetermined reasons, which resulted in impact with terrain.
- [NTSB CEN18LA069](https://openairdocs.org/ntsb/CEN18LA069.md): Robinson Helicopter R44 II · Albany, TX · Accident · No injuries · Limited investigation · Final report · Jan 8, 2018 · N797JR · Substantial damage
  > A loss of helicopter control for reasons that could not be determined because postaccident examination did not reveal any evidence of mechanical malfunctions or failures of the main rotor and tail rotor systems that would have precluded normal operation.
- [NTSB CEN16WA149](https://openairdocs.org/ntsb/CEN16WA149.md): Robinson Helicopter R44 II · Atemajac de Brizuela, Mexico · Accident · Serious injuries · Foreign investigation · Apr 2, 2016 · N565AC · Destroyed
  > On April 2, 2015, about 2120 universal coordinated time, a Robinson Helicopter Company R44 II helicopter, N565AC, impacted terrain near Atemajac de Brizuela, Mexico. The pilot and two passengers were uninjured and one passenger sustained a serious injury. The…
- [NTSB CEN15LA285](https://openairdocs.org/ntsb/CEN15LA285.md): Robinson Helicopter R44 II · Danville, AR · Accident · No injuries · Limited investigation · Final report · Jun 21, 2015 · N305CG · Substantial damage
  > The loss of engine power for reasons that could not be determined based on the available information.
- [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.

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('7640122', '7640123')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s.case_mkey = x.case_mkey AND s.aircrafts_position = x.position AND 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?model=7640122

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