# NTSB investigations: Lycoming IO-540-AE1A5, 2009

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 WPR09LA460](https://openairdocs.org/ntsb/WPR09LA460.md): Robinson Helicopter R44 II · Valley Center, CA · Accident · Serious injuries · Limited investigation · Final report · Sep 20, 2009 · N4174P · Substantial damage
  > The failure of the engine’s camshaft due to fatigue of unknown origin.
- [NTSB ANC09LA098](https://openairdocs.org/ntsb/ANC09LA098.md): Robinson Helicopter R44 II · Central, AK · Accident · No injuries · Limited investigation · Final report · Sep 7, 2009 · N4186Y · Substantial damage
  > The pilot’s failure to maintain control of the helicopter after an in-flight encounter with a downdraft while landing. Contributing to the accident was the pilot’s inadequate evaluation of wind conditions.
- [NTSB ERA09LA421](https://openairdocs.org/ntsb/ERA09LA421.md): Robinson Helicopter R44 II · Dunedin, FL · Accident · No injuries · Limited investigation · Final report · Jul 24, 2009 · N645JC · Substantial damage
  > A partial loss of engine power for undetermined reasons.
- [NTSB WPR09LA312](https://openairdocs.org/ntsb/WPR09LA312.md): Robinson Helicopter R44 II · Lakeport, CA · Accident · No injuries · Limited investigation · Final report · Jun 25, 2009 · N515DG · Substantial damage
  > A loss of engine power while maneuvering for undetermined reasons.
- [NTSB CEN09CA270](https://openairdocs.org/ntsb/CEN09CA270.md): Robinson Helicopter R44 II · Kent, TX · Accident · No injuries · Data collection · Final report · Apr 23, 2009 · N518SJ · Substantial damage
  > The pilot's failure to maintain control of the helicopter.
- [NTSB WPR09FA076](https://openairdocs.org/ntsb/WPR09FA076.md): Robinson Helicopter R44 II · West Valley City, UT · Accident · Serious injuries · Field investigation · Final report · Jan 9, 2009 · N168SH · Substantial damage
  > The pilot’s inadvertent VFR flight into IMC conditions, which resulted in his spatial disorientation and loss of control of the helicopter. Also causal was the flight instructor’s delay in taking remedial action.

## 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 year(c."eventDate") = 2009
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41899'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41899&year=2009

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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.