# NTSB investigations: Rolls-Royce 250-C30, AZ

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 WPR26FA074](https://openairdocs.org/ntsb/WPR26FA074.md): MD Helicopters 369FF · Superior, AZ · Accident · 4 fatal · Class 3 · Field · Preliminary report · Jan 2, 2026 · N3502P · Substantial damage
  > On January 2, 2026, at about 1100 mountain standard time, an MD Helicopters MD369FF helicopter, N3502P, was substantially damaged when it impacted a highline/slackline near Superior, Arizona. The pilot and three passengers were fatally injured. The helicopter…
- [NTSB WPR24LA239](https://openairdocs.org/ntsb/WPR24LA239.md): Mcdonnell Douglas Helicopter 369 · Mesa, AZ · Accident · No injuries · Class 4 · Limited · Final report · Jul 9, 2024 · N540HH · Substantial damage
  > The pilot receiving instruction’s failure to maintain helicopter control during autorotation, which resulted in a dynamic rollover. Contributing to the accident was the delayed remedial action from the flight instructor.
- [NTSB WPR24LA028](https://openairdocs.org/ntsb/WPR24LA028.md): MD Helicopters 369FF · Mesa, AZ · Accident · No injuries · Class 4 · Limited · Final report · Nov 6, 2023 · N369FF · Substantial damage
  > The pilot’s failure to maintain a proper autorotation profile during deceleration that resulted in the tail rotor assembly impacting the ground.
- [NTSB WPR21LA183](https://openairdocs.org/ntsb/WPR21LA183.md): MD Helicopters 369FF · Mesa, AZ · Accident · No injuries · Class 4 · Limited · Final report · May 5, 2021 · N6068S · Substantial damage
  > A tail rotor blade strike to an undetermined object while practicing approaches to unimproved 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" = 'AZ' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('54023'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=54023&state=AZ

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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.