# NTSB investigations: Allison 250-C30 series: 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 WPR21LA338](https://openairdocs.org/ntsb/WPR21LA338.md): Bell 206L-3 · Tillamook, OR · Accident · No injuries · Class 4 · Limited · Final report · Sep 8, 2021 · N6516K · Substantial damage
  > The pilot's failure to maintain clearance from a powerline during a low reconnaissance, with sun glare.
- [NTSB WPR20LA163](https://openairdocs.org/ntsb/WPR20LA163.md): Bell 206 · Fairfield, CA · Accident · 3 fatal · Class 3 · Limited · Final report · Jun 2, 2020 · N65PJ · Substantial damage
  > The pilot’s failure to maintain adequate clearance from powerlines while conducting external load operations, which resulted in the main rotor contacting a wire and a subsequent collision with terrain.
- [NTSB WPR19LA071](https://openairdocs.org/ntsb/WPR19LA071.md): Bell 206 · Ashland, OR · Accident · 1 fatal · Class 3 · Limited · Final report · Jan 23, 2019 · N8227J · Substantial damage
  > The pilot's decision to continue visual flight into deteriorating weather, which resulted in an encounter with instrument meteorological conditions and spatial disorientation leading to a loss of control.
- [NTSB CEN14FA122](https://openairdocs.org/ntsb/CEN14FA122.md): Bell 206L 3 · Silt, CO · Accident · 3 fatal · Field investigation · Final report · Jan 27, 2014 · N207DS · Destroyed
  > The pilot’s inadequate preflight planning for a low-level aerial surveillance flight of power transmission lines, which led to his being unaware of the crossing power line while flying toward the sun and his subsequent failure to maintain sufficient clearance…
- [NTSB ERA11CA082](https://openairdocs.org/ntsb/ERA11CA082.md): Bell 206L-3 · Canal Point, FL · Accident · Serious injuries · Data collection · Final report · Dec 8, 2010 · N955GT · Substantial damage
  > The pilot's failure to maintain clearance from the ground while maneuvering at a low altitude. Contributing to the accident was the pilot’s fatigue.
- [NTSB ERA09FA419](https://openairdocs.org/ntsb/ERA09FA419.md): MD Helicopter 530 (369FF) · Camp Butler, Iraq · Accident · 3 fatal · Field investigation · Final report · Jul 17, 2009 · N974BW · Destroyed
  > The pilot’s failure to maintain terrain clearance during a low-level course reversal.

## 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 ('03015')
    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=03015

---
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.