# NTSB investigations: Allison 250 series, OR

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 WPR20LA224](https://openairdocs.org/ntsb/WPR20LA224.md): Hiller UH 12D · Mehama, OR · Accident · 1 fatal · Class 3 · Limited · Final report · Jul 17, 2020 · N2297W · Destroyed
  > An in-flight separation of a tail rotor blade due to fatigue cracking and overstress, which resulted in a loss of directional control and subsequent ground impact.
- [NTSB WPR14CA280](https://openairdocs.org/ntsb/WPR14CA280.md): Bell 47G · Gaston, OR · Accident · No injuries · Data collection · Final report · Jul 3, 2014 · N684PC · Substantial damage
  > The pilot's inability to maintain control of the helicopter as a result of a hydraulic hose becoming entangled around the right skid.
- [NTSB WPR12LA347](https://openairdocs.org/ntsb/WPR12LA347.md): Hiller UH-12D · Deer Island, OR · Accident · Minor injuries · Limited investigation · Final report · Aug 7, 2012 · N47035 · Substantial damage
  > A loss of helicopter control while maneuvering at low altitude for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation.
- [NTSB WPR10CA470](https://openairdocs.org/ntsb/WPR10CA470.md): Bell 47G · Gaston, OR · Accident · No injuries · Data collection · Final report · Sep 26, 2010 · N7860S · Substantial damage
  > The pilot's failure to maintain tail rotor clearance while landing on a transport trailer positioned on an uneven surface.
- [NTSB SEA05FA004](https://openairdocs.org/ntsb/SEA05FA004.md): Maule MT-7-420 · Bend, OR · Accident · No injuries · Field investigation · Final report · Oct 8, 2004 · N186SB · Substantial damage
  > Loss of engine power during takeoff climb for undetermined reasons. Rough terrain was a factor.
- [NTSB SEA94LA039](https://openairdocs.org/ntsb/SEA94LA039.md): Hiller-Soloy UH-12D · Sublimity, OR · Accident · No injuries · Limited investigation · Final report · Dec 7, 1993 · N2297W · Substantial damage
  > Fuel exhaustion due to inadequate preflight and refueling not acomplished.
- [NTSB SEA94LA037](https://openairdocs.org/ntsb/SEA94LA037.md): Hiller UH-12D · Sublimity, OR · Accident · No injuries · Limited investigation · Final report · Nov 26, 1993 · N59366 · Substantial damage
  > The pilot's failure to maintain clearance from unmarked transmission wires. Factors include the pilot's inadequate visual lookout, and unmarked wires in the area of operation.
- [NTSB SEA86FA039](https://openairdocs.org/ntsb/SEA86FA039.md): Hiller-Soloy UH-12E · Horton, OR · Accident · 1 fatal · Field investigation · Final report · Jan 16, 1986 · N40290 · Destroyed
  > The fork connecting the rotorcraft's blue blade to the main rotor hub separated after a long term fatigue crack had spread through more than 60% of the fork circumference. The operator failed to carry out the appropriate inspection of the fork unit as…
- [NTSB SEA82FYM11](https://openairdocs.org/ntsb/SEA82FYM11.md): Hiller UH-12E · Mount Angle, OR · Accident · Minor injuries · Final report · Mar 8, 1982 · N59366 · Destroyed
  > The aircraft was being used on an external load operation. On his fourth load, the pilot was to transport a 1190 lb electric pump and fan from the back of a pickup truck. While preparing to lift the load, the pilot was not satisfied with its position. He…
- [NTSB SEA82DYM07](https://openairdocs.org/ntsb/SEA82DYM07.md): Hiller Acft UH-12E · Nashville, OR · Accident · No injuries · Closed · Dec 3, 1981 · N161HA · Substantial damage
- [NTSB SEA80DYM55](https://openairdocs.org/ntsb/SEA80DYM55.md): Hiller Acft UH-12E · Tillamook, OR · Accident · No injuries · Closed · Aug 19, 1980 · N59366 · Substantial damage
- [NTSB SEA79FYM32](https://openairdocs.org/ntsb/SEA79FYM32.md): Hiller Acft UH-12E · Independence, OR · Accident · No injuries · Closed · May 11, 1979 · N161HA · Substantial damage
- [NTSB SEA79DYM23](https://openairdocs.org/ntsb/SEA79DYM23.md): Hiller Acft UH-12E · Friend, OR · Accident · No injuries · Closed · Mar 24, 1979 · N175HA · Substantial damage
- [NTSB SEA78FYK06](https://openairdocs.org/ntsb/SEA78FYK06.md): Hiller UH-12E · Reedsport, OR · Accident · 1 fatal · Closed · Jan 20, 1978 · N65149 · Minor damage

## 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" = 'OR' 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 ('03014', '03019'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03014&state=OR

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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.