# NTSB investigations: Hughes OH-6A, AZ

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 WPR09TA277](https://openairdocs.org/ntsb/WPR09TA277.md): Hughes OH-6A · Benson, AZ · Accident · No injuries · Final report · Jun 4, 2009 · N6641D · Substantial damage
  > The pilot under instruction's inadequate autorotation technique and the instructor pilot’s delayed remedial action to arrest the rate of descent of the helicopter while in an autorotation flare.
- [NTSB LAX05TA018](https://openairdocs.org/ntsb/LAX05TA018.md): Hughes OH-6A · Tucson, AZ · Accident · Serious injuries · Final report · Oct 25, 2004 · N6188L · Destroyed
  > The loss of engine power due to a fatigue fracture of the PC line from the governor to fuel control, resulting from fretting damage induced by excessive vibration, which was due to the failure of maintenance personnel to install the proper bearings in the…
- [NTSB LAX03TA150](https://openairdocs.org/ntsb/LAX03TA150.md): Hughes OH 6A · Pan Tak, AZ · Accident · Serious injuries · Final report · May 12, 2003 · N6636H · Destroyed
  > The pilot in command's failure to adequately secure loose cargo (a jacket), which resulted in the jacket colliding with the tail rotor during cruise flight, and the subsequent separation of the tail rotor and loss of flight control. A factor associated with…
- [NTSB LAX00TA163](https://openairdocs.org/ntsb/LAX00TA163.md): Hughes OH-6A · Green Valley, AZ · Accident · Minor injuries · Final report · Apr 20, 2000 · N61869 · Substantial damage
  > Company maintenance personnel's failure to secure an attachment nut to a control link. While maneuvering, the parts separated and resulted in the total cyclic control system failure and impact into rough terrain.
- [NTSB LAX99GA216](https://openairdocs.org/ntsb/LAX99GA216.md): Hughes OH-6A · Tucson, AZ · Accident · Serious injuries · Final report · Jun 15, 1999 · N6187C · Destroyed
  > Fuel exhaustion resulting from pilot's failure to perform adequate fuel consumption calculations. The unreliable and inoperative fuel level indicating system components and the operator's operation of the aircraft with known deficiencies were factors in the…

## 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" = 'AZ' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('4470905'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4470905&state=AZ

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