# NTSB investigations: Lycoming VO-435 series, 2013

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 ERA14FA066](https://openairdocs.org/ntsb/ERA14FA066.md): Texas Helicopter M74L · Sebring, FL · Accident · 1 fatal · Field investigation · Final report · Dec 6, 2013 · N1001N · Destroyed
  > A partial loss of engine power as a result of contamination of the engine’s fuel supply, and the pilot’s impaired performance due to his use of diphenhydramine, which resulted in his inability to complete a forced or precautionary autorotative landing…
- [NTSB WPR13LA429](https://openairdocs.org/ntsb/WPR13LA429.md): Texas Helicopter OH-13E/M74 · Santa Maria, CA · Accident · Minor injuries · Limited investigation · Final report · Sep 29, 2013 · N38113 · Substantial damage
  > The pilot's inadequate monitoring of the environment and failure to maintain clearance from transmission wires during a low-altitude maneuver.
- [NTSB WPR13LA404](https://openairdocs.org/ntsb/WPR13LA404.md): Bell 47G5 · King City, CA · Accident · No injuries · Limited investigation · Final report · Sep 11, 2013 · N7836S · Substantial damage
  > The failure of the helicopter’s center frame tube due to a fatigue crack and corrosion originating from a welded surface. Contributing to the accident was maintenance personnel’s inadequate inspection of the helicopter during its most recent 100-hour…
- [NTSB CEN13LA537](https://openairdocs.org/ntsb/CEN13LA537.md): Continental Copters Tomcat MK5A · Arlington, MN · Accident · No injuries · Limited investigation · Final report · Sep 6, 2013 · N9005T · Substantial damage
  > The pilot’s failure to maintain control of the helicopter while maneuvering when he removed his hand from the collective control while plugging in his radio connection to his helmet, which resulted in the collective moving to the full-down position.
- [NTSB CEN13LA442](https://openairdocs.org/ntsb/CEN13LA442.md): Texas Helicopter OH-13H/M74A · Streator, IL · Accident · No injuries · Limited investigation · Final report · Jul 29, 2013 · N10009 · Substantial damage
  > The pilot's diverted attention during an agricultural application maneuver, which resulted in the helicopter impacting a corn field.
- [NTSB WPR13CA084](https://openairdocs.org/ntsb/WPR13CA084.md): Bell 47G · Five Points, CA · Accident · Minor injuries · Data collection · Final report · Jan 3, 2013 · N14841 · Substantial damage
  > The pilot’s failure to maintain clearance with a telephone pole during a low-level maneuver.

## 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") = 2013
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41525'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41525&year=2013

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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.