# Final NTSB investigations: Rolls-Royce 250-C300/A1

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 CEN26LA203](https://openairdocs.org/ntsb/CEN26LA203.md): Robinson Helicopter R66 · Fort Worth, TX · Accident · Serious injuries · Class 4 · Limited · Final report · May 27, 2026 · N5488H · Substantial damage
  > The flight instructor’s delayed remedial action and the student pilot’s failure to maintain helicopter control during hover.
- [NTSB CEN26LA153](https://openairdocs.org/ntsb/CEN26LA153.md): Robinson Helicopter R66 · Arlington, TX · Accident · No injuries · Class 4 · Limited · Final report · Mar 27, 2026 · N4059A · Substantial damage
  > The pilot’s failure to maintain clearance from terrain during the hover taxi.
- [NTSB CEN26LA119](https://openairdocs.org/ntsb/CEN26LA119.md): Robinson Helicopter R66 · Graford, TX · Accident · No injuries · Class 4 · Limited · Final report · Feb 19, 2026 · N940BH · Substantial damage
  > The pilot’s failure to maintain sufficient rotor speed during a practice autorotation to soft terrain which resulted in a loss of control and roll over.
- [NTSB WPR25LA199](https://openairdocs.org/ntsb/WPR25LA199.md): Robinson Helicopter R66 · Tukwila, WA · Accident · No injuries · Class 4 · Limited · Final report · Jun 30, 2025 · N23UP · Substantial damage
  > The pilot’s failure to maintain yaw control during a takeoff to a hover in a gusting crosswind, which resulted in a loss of directional control and a subsequent hard landing.
- [NTSB CEN22LA006](https://openairdocs.org/ntsb/CEN22LA006.md): Robinson Helicopter R66 · Delta, MO · Accident · Minor injuries · Class 4 · Limited · Final report · Oct 5, 2021 · N266RK · Substantial damage
  > The pilot’s inadequate inflight planning and his failure to see and avoid a wire which resulted in contact with the wire and subsequent ground impact.
- [NTSB CEN21LA421](https://openairdocs.org/ntsb/CEN21LA421.md): Robinson Helicopter R66 · Reynoldsville, IL · Accident · No injuries · Class 4 · Limited · Final report · Sep 15, 2021 · N166LW · Substantial damage
  > The pilot’s failure to maintain clearance from the wire during low altitude operations in windy conditions.
- [NTSB WPR21FA300](https://openairdocs.org/ntsb/WPR21FA300.md): Robinson Helicopter R66 · Colusa, CA · Accident · 4 fatal · Class 3 · Field · Final report · Aug 1, 2021 · N7000J · Destroyed
  > The pilot’s abrupt flight control input that led to mast bumping and a subsequent in-flight breakup.
- [NTSB CEN21LA348](https://openairdocs.org/ntsb/CEN21LA348.md): Robinson Helicopter R66 · Merry, NE · Accident · Serious injuries · Class 4 · Limited · Final report · Jul 30, 2021 · N857TL · Substantial damage
  > The pilot’s failure to maintain clearance from a wire during a low-level aerial application flight.
- [NTSB ERA21LA270](https://openairdocs.org/ntsb/ERA21LA270.md): Robinson Helicopter R66 · Waxhaw, NC · Accident · No injuries · Class 4 · Limited · Final report · Jun 27, 2021 · N7078V · Substantial damage
  > The pilot’s failure to maintain clearance from powerlines during a low-level aerial application flight.
- [NTSB ERA21LA171](https://openairdocs.org/ntsb/ERA21LA171.md): Robinson Helicopter R66 · Palmyra, PA · Accident · Serious injuries · Class 3 · Limited · Final report · Apr 3, 2021 · N577DD · Substantial damage
  > The pilot’s improper judgment to attempt a flight while impaired by medications, which resulted in the helicopter’s abnormal ground contact, loss of control, and collision with terrain.
- [NTSB CEN21LA154](https://openairdocs.org/ntsb/CEN21LA154.md): Robinson Helicopter R66 · Duson, LA · Accident · No injuries · Class 4 · Limited · Final report · Mar 9, 2021 · N49XB · Substantial damage
  > The uncertified pilot’s failure to maintain control of the helicopter when encountering a wind gust while hovering to land.
- [NTSB ANC21LA020](https://openairdocs.org/ntsb/ANC21LA020.md): Robinson Helicopter R66 · Kodiak, AK · Accident · 1 fatal · Class 3 · Limited · Final report · Mar 3, 2021 · N1767 · Destroyed
  > An impact with ocean waters for reasons that could not be determined based on the available information.
- [NTSB ERA21LA121](https://openairdocs.org/ntsb/ERA21LA121.md): Robinson Helicopter R66 · Knoxville, TN · Accident · No injuries · Class 4 · Limited · Final report · Jan 30, 2021 · N660TN · Substantial damage
  > The pilot’s failure to maintain directional control of the helicopter, which resulted in rear portion of the right skid contacting the ground and a subsequent dynamic rollover.
- [NTSB ERA20LA220](https://openairdocs.org/ntsb/ERA20LA220.md): Robinson R66 · Pikeville, NC · Accident · 1 fatal · Class 3 · Limited · Final report · Jun 18, 2020 · N4QW · Substantial damage
  > The pilot’s failure to see and avoid a small diameter wire during low altitude agricultural spraying operations. Contributing to the accident was the pilot’s insufficient property survey.
- [NTSB ERA20FA074](https://openairdocs.org/ntsb/ERA20FA074.md): Robinson R66 · Mechanicsburg, PA · Accident · 2 fatal · Class 3 · Field · Final report · Jan 10, 2020 · N450MC · Destroyed
  > A severe left roll excursion after the onset of pitch and roll oscillations, which were not arrested by the pilot for undetermined reasons. This resulted in main rotor blade contact with the airframe and a subsequent inflight breakup of the helicopter.
- [NTSB CEN19LA123](https://openairdocs.org/ntsb/CEN19LA123.md): Robinson R66 · St Jacob, IL · Accident · Serious injuries · Class 3 · Limited · Final report · Apr 21, 2019 · N766WC · Substantial damage
  > The pilot's in-flight collision with an unmarked wire during an aerial application flight; the wire lacked contrast with the surrounding environment.
- [NTSB GAA18CA366](https://openairdocs.org/ntsb/GAA18CA366.md): Robinson R66 · Cordova, AK · Accident · No injuries · Data collection · Final report · Jun 19, 2018 · N7040P · Substantial damage
  > The pilot’s selection of unsuitable terrain for landing, which resulted in impact with brush and a loss of helicopter control.
- [NTSB GAA16CA290](https://openairdocs.org/ntsb/GAA16CA290.md): Robinson Helicopter R66 · Beaumont, TX · Accident · No injuries · Data collection · Final report · Jun 7, 2016 · N38SL · Substantial damage
  > The non-pilot owner's decision to start the helicopter while awaiting the pilot's arrival, which resulted in a loss of yaw control and a rollover.
- [NTSB WPR16LA075](https://openairdocs.org/ntsb/WPR16LA075.md): Robinson Helicopter R66 · Torrance, CA · Accident · No injuries · Limited investigation · Final report · Feb 23, 2016 · N266RH · Substantial damage
  > A vibration of the helicopter, which resulted in an autorotation to soft terrain and subsequent impact of the tail boom with the main rotor. The reason for the vibration could not be determined because postaccident examination revealed no malfunctions or…
- [NTSB ERA15CA079](https://openairdocs.org/ntsb/ERA15CA079.md): Robinson Helicopter R66 · Henniker, NH · Accident · No injuries · Data collection · Final report · Dec 22, 2014 · N64HF · Substantial damage
  > The pilot's failure to maintain aircraft control while landing, which resulted in a collision with a snow bank. Contributing to the accident was ice that covered the landing surface.
- [NTSB CEN15CA039](https://openairdocs.org/ntsb/CEN15CA039.md): Robinson Helicopter R66 · Baton Rouge, LA · Accident · No injuries · Data collection · Final report · Oct 29, 2014 · N67GA · Substantial damage
  > An in-flight bird strike.
- [NTSB ERA13FA336](https://openairdocs.org/ntsb/ERA13FA336.md): Robinson R66 · Noxen, PA · Accident · 5 fatal · Field investigation · Final report · Jul 28, 2013 · N646AG · Destroyed
  > The pilot's decision to continue VFR flight into night instrument meteorological conditions, which resulted in spatial disorientation and a loss of control.

## 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."completionStatus" = 'Completed'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('54232'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=54232&status=final

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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.