# NTSB investigations: Rolls-Royce 250-C30: Low altitude operation/event

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 WPR26FA121](https://openairdocs.org/ntsb/WPR26FA121.md): MD Helicopters 369FF · Mojave, CA · Accident · 1 fatal · Class 3 · Field · Preliminary report · Mar 9, 2026 · N530XX · Substantial damage
  > On March 9, 2026, about 1517 Pacific daylight time, an MD Helicopters 369FF, N530XX, was destroyed when it was involved in an accident near Mojave, California. The pilot was fatally injured. The helicopter was operated as a Title 14 Code of Federal…
- [NTSB GAA18CA378](https://openairdocs.org/ntsb/GAA18CA378.md): Mcdonnell Douglas Heli 369 · Yabucoa, PR · Accident · No injuries · Data collection · Final report · Jun 16, 2018 · N900FF · Substantial damage
  > The pilot's failure to maintain main rotor clearance from a fiber line while picking up a lineman.

## 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.engine_model_code IN ('54023')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '220'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/220/cases?engine=54023

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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.