# Final NTSB investigations: Continental IO-540 series

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 CEN25LA359](https://openairdocs.org/ntsb/CEN25LA359.md): Robinson Helicopter R44 II · Nashville, AR · Accident · No injuries · Class 4 · Limited · Final report · Aug 31, 2025 · N442PR · Substantial damage
  > The pilot’s inadequate fuel planning which resulted in a total loss of power due to fuel exhaustion. Contributing to the accident was the landing zone being unlit.
- [NTSB ERA24LA244](https://openairdocs.org/ntsb/ERA24LA244.md): Ruth Hummingbird · New Hill, NC · Accident · No injuries · Class 4 · Limited · Final report · Jun 1, 2024 · N331PF · Substantial damage
  > The pilot's failure to maintain control of the helicopter while hovering.
- [NTSB GAA17CA450](https://openairdocs.org/ntsb/GAA17CA450.md): Robinson Helicopter R44 · Dunlap, IL · Accident · Minor injuries · Data collection · Final report · Jul 31, 2017 · N344MM · Substantial damage
  > The pilot’s failure to visually confirm that the helicopter was disconnected from hoses during refueling operations. Contributing to the accident was the pilot’s and ground crew’s misunderstanding of the hand signals.
- [NTSB GAA17CA165](https://openairdocs.org/ntsb/GAA17CA165.md): Robinson Helicopter R44 · Spofford, TX · Accident · Minor injuries · Data collection · Final report · Feb 19, 2017 · N804DF · Substantial damage
  > The pilot's decision to hover-taxi out of the hangar and his subsequent failure to maintain clearance from the hangar.
- [NTSB GAA15CA232](https://openairdocs.org/ntsb/GAA15CA232.md): Robinson Helicopter R44 II · Prairie Lea, TX · Accident · Minor injuries · Data collection · Final report · Jul 16, 2015 · N804DF · Substantial damage
  > The pilot's failure to maintain rotor rpm, resulting in an uncontrolled descent and collision with trees.
- [NTSB ANC10FA048](https://openairdocs.org/ntsb/ANC10FA048.md): Cessna U206F · Anchorage, AK · Accident · 1 fatal · Field investigation · Final report · Jun 2, 2010 · N59352 · Substantial damage
  > The pilot’s decision to load the airplane well beyond its allowable weight and center of gravity limits, resulting in a loss of control during the initial climb. Contributing to the severity of the injuries was the pilot’s decision to allow two child…
- [NTSB DFW08CA177](https://openairdocs.org/ntsb/DFW08CA177.md): Robinson R44 II · Canyon Lake, TX · Accident · Minor injuries · Data collection · Final report · Jul 5, 2008 · N804DF · Substantial damage
  > A total loss of tail rotor effectiveness. Contributing to the accident was the pilot's improper decision to operate inside the height velocity curve.
- [NTSB CHI08CA177](https://openairdocs.org/ntsb/CHI08CA177.md): Robinson R44 II · Ottawa, IL · Accident · No injuries · Data collection · Final report · Jul 4, 2008 · N31138 · Substantial damage
  > The pilot's failure to maintain clearance from the power transmission lines. Contributing to the accident was the unmarked power transmission lines.
- [NTSB ANC03CA114](https://openairdocs.org/ntsb/ANC03CA114.md): Cessna 206 · Ketchikan, AK · Accident · No injuries · Data collection · Final report · Aug 14, 2003 · N59352 · Substantial damage
  > The pilot's selection of an unsuitable takeoff area, which resulted in an in-flight collision with ocean waves. A factor associated with the accident was large waves/swells.
- [NTSB DEN99LA167](https://openairdocs.org/ntsb/DEN99LA167.md): Piper PA-32-300 · Rifle, CO · Accident · No injuries · Limited investigation · Final report · Sep 19, 1999 · N323DT · Substantial damage
  > The pilot's failure to maintain aircraft control during landing roll. Factors were the strong crosswind weather conditions, and the runway sign that the airplane impacted.

## 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 ('17051'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=17051&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.