# NTSB investigations: Allison 250-C20 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 WPR13GA374](https://openairdocs.org/ntsb/WPR13GA374.md): Mcdonnell Douglas Helicopter 369E · Burns, OR · Accident · No injuries · Final report · Aug 12, 2013 · N62PJ · Substantial damage
  > The total loss of engine power during cruise flight due to the separation of one of the 4th-stage turbine wheel blades due to low-cycle fatigue cracking that had progressed to high-cycle fatigue cracking, which ultimately led to the overload failure of the…
- [NTSB WPR13LA358](https://openairdocs.org/ntsb/WPR13LA358.md): Bell 206B · Chualar, CA · Accident · Minor injuries · Limited investigation · Final report · Aug 4, 2013 · N90146 · Substantial damage
  > Maintenance personnel's failure to properly tighten the bolts securing the main driveshaft to the transmission, which resulted in fatigue failure of the bolts and disconnection of the driveshaft during low-altitude flight.
- [NTSB ERA13TA341](https://openairdocs.org/ntsb/ERA13TA341.md): Mcdonnell Douglas Helicopter 369E · Jackson, KY · Accident · Serious injuries · Final report · Jul 29, 2013 · N1608D · Destroyed
  > The helicopter pilot's inadvertent collision with an unmarked and uncharted utility wire of which he was unaware.
- [NTSB ERA13LA344](https://openairdocs.org/ntsb/ERA13LA344.md): Hughes 369D · Center Point, WV · Accident · Minor injuries · Limited investigation · Final report · Jul 29, 2013 · N31HM · Substantial damage
  > A total loss of engine power for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB ANC13LA066](https://openairdocs.org/ntsb/ANC13LA066.md): Cessna T207A · King Salmon, AK · Accident · Minor injuries · Limited investigation · Final report · Jul 21, 2013 · N499K · Substantial damage
  > The pilot’s inadequate visual lookout while departing from a multiple-use waterway, which resulted in a collision with a drifting boat. Contributing to the accident were the lack of visual conspicuity of the boat and the limited amount of time the boat…
- [NTSB WPR13LA287](https://openairdocs.org/ntsb/WPR13LA287.md): Bell 206B · Royal City, WA · Accident · Serious injuries · Limited investigation · Final report · Jun 24, 2013 · N407FK · Substantial damage
  > The pilot's failure to maintain clearance from netting material during a low pass over trees, which resulted in a loss of helicopter control.
- [NTSB ERA13LA236](https://openairdocs.org/ntsb/ERA13LA236.md): Bell 206B · Hartford, KY · Accident · No injuries · Limited investigation · Final report · May 10, 2013 · N94PH · Substantial damage
  > The pilot’s failure to avoid a powerline that crossed a field that he was spraying. Contributing to the collision was the company’s failure to specifically mention that flight hazards be identified during a pre-work conference.
- [NTSB WPR13FA208](https://openairdocs.org/ntsb/WPR13FA208.md): Bell 206B · Shepherd, MT · Accident · 1 fatal · Field investigation · Final report · Apr 27, 2013 · N150SP · Substantial damage
  > The pilot’s loss of control while maneuvering during low-altitude operations due to sudden neurological impairment or incapacitation and the helicopter’s subsequent collision with power lines.
- [NTSB WPR13GA128](https://openairdocs.org/ntsb/WPR13GA128.md): Bell 206B · Eureka, NV · Accident · 1 fatal · Final report · Feb 18, 2013 · N20620 · Substantial damage
  > The pilot’s failure to maintain clearance from a wire while maneuvering during low-altitude operations. Contributing to the accident was task- and/or work-related fatigue.

## 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 ('03020'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03020&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.