# NTSB investigations: Allison T63 series, CA

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 WPR22LA140](https://openairdocs.org/ntsb/WPR22LA140.md): Bell OH-58A · Merced, CA · Accident · Minor injuries · Class 4 · Limited · Final report · Apr 1, 2022 · N9287U · Substantial damage
  > The pilot’s failure to see and avoid wires while conducting an aerial application flight, which resulted in a wire strike and ground impact.
- [NTSB WPR22LA032](https://openairdocs.org/ntsb/WPR22LA032.md): Bell OH-58A · Holtville, CA · Accident · No injuries · Class 4 · Limited · Final report · Nov 9, 2021 · N902SF · Substantial damage
  > The pilot’s failure to maintain helicopter control after becoming spatially disoriented when the helicopter entered low-level haze/fog.
- [NTSB WPR20CA092](https://openairdocs.org/ntsb/WPR20CA092.md): Bell OH 58A · Colexico, CA · Accident · No injuries · Data collection · Final report · Feb 19, 2020 · N288NS · Substantial damage
  > The pilot's failure to arrest the descent rate while maneuvering at low altitude, which resulted in impact with terrain.
- [NTSB WPR12LA371](https://openairdocs.org/ntsb/WPR12LA371.md): Arrow Falcon Exporters OH58 · Escalon, CA · Accident · Serious injuries · Limited investigation · Final report · Aug 27, 2012 · N503DR · Substantial damage
  > The pilot’s failure to maintain clearance from trees during a low-altitude agricultural application, which resulted in a loss of control and impact with the ground.
- [NTSB WPR12LA096](https://openairdocs.org/ntsb/WPR12LA096.md): Arrow Falcon Exporters OH-58A · Brawley, CA · Accident · No injuries · Limited investigation · Final report · Jan 21, 2012 · N902SF · Substantial damage
  > The failure of the main rotor mast due to fatigue cracks that originated from corrosion pits. Contributing to the accident was the operator’s failure to adhere to the manufacturer’s recommended overhaul interval for the main rotor mast.
- [NTSB WPR10LA126](https://openairdocs.org/ntsb/WPR10LA126.md): Arrow Falcon Exporters OH-58A · Escalon, CA · Accident · Serious injuries · Limited investigation · Final report · Feb 2, 2010 · N9286U · Substantial damage
  > A loss of engine power during cruise flight due to the fatigue failure of the pneumatic fuel-to-governor control line. Also causal was the inadequate installation of the pneumatic line by maintenance personnel, and the pilot’s decision to continue flight with…
- [NTSB LAX08CA054](https://openairdocs.org/ntsb/LAX08CA054.md): Bell OH-58A · Brawley, CA · Accident · No injuries · Data collection · Final report · Jan 30, 2008 · N902SF · Substantial damage
  > The pilot's failure to maintain clearance from obstacles. A factor in the accident was the dark night conditions.
- [NTSB LAX05FA264](https://openairdocs.org/ntsb/LAX05FA264.md): San Joaquin Helicopters OH-58A+ · Lancaster, CA · Accident · 1 fatal · Field investigation · Final report · Aug 10, 2005 · N177SJ · Substantial damage
  > The pinion to turbine shaft coupling failed in fatigue due to a misaligned turbine shaft, which resulted in a loss of engine power.
- [NTSB LAX00LA076](https://openairdocs.org/ntsb/LAX00LA076.md): Bell OH-58C · Brawley, CA · Accident · Minor injuries · Limited investigation · Final report · Jan 19, 2000 · N436SD · Substantial damage
  > The fuel system contamination that resulted in a loss of engine power during aerial application and a subsequent collision with the ground.
- [NTSB LAX99LA319](https://openairdocs.org/ntsb/LAX99LA319.md): Bell OH58A · Salinas, CA · Accident · No injuries · Limited investigation · Final report · Sep 18, 1999 · N5800K · Substantial damage
  > The pilot's failure to maintain an adequate clearance from all ground obstacles during a low altitude aerial application flight.
- [NTSB LAX98LA134](https://openairdocs.org/ntsb/LAX98LA134.md): Bell OH-58A · Huron, CA · Accident · Minor injuries · Limited investigation · Final report · Apr 9, 1998 · N176SJ · Substantial damage
  > A loss of engine power due to deteriorated O-ring seals in the fuel boost pump, which allowed air to enter the fuel lines. Factors in the accident were the inadequate manufacturer's inspection criteria for the fuel boost pump O-ring seals and the resulting…

## 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."eventStateOrRegion" = 'CA' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03031'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03031&state=CA

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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.