# NTSB investigations, OR: Unknown or undetermined

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 WPR26LA352](https://openairdocs.org/ntsb/WPR26LA352.md): Beech B95 · Newport, OR · Accident · 1 fatal · Class 4 · Limited · Investigation open · Sep 21, 2026 · N529RB
- [NTSB WPR26FA289](https://openairdocs.org/ntsb/WPR26FA289.md): Cirrus Design SR22T · Bend, OR · Accident · 1 fatal · Class 3 · Field · Preliminary report · Aug 5, 2026 · N625LK · Substantial damage
  > On August 4, 2026, at about 1845 Pacific daylight time, a Cirrus Design Corporation SR22T airplane, N625LK, was substantially damaged when it was involved in an accident near Bend, Oregon. The pilot was fatally injured. The airplane was operated as Title 14…
- [NTSB WPR26FA217](https://openairdocs.org/ntsb/WPR26FA217.md): Lancair 235 · Hillsboro, OR · Accident · 1 fatal · Class 3 · Field · Preliminary report · Jun 12, 2026 · N10CF · Substantial damage
  > On June 12, 2026, at about 1508 Pacific daylight time, a Lancair 235, N10CF, was destroyed when it was involved in an accident near Hillsboro, Oregon. The pilot was fatally injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91…
- [NTSB WPR24LA082](https://openairdocs.org/ntsb/WPR24LA082.md): Piper PA-18A 150 · Eden, OR · Accident · Serious injuries · Class 3 · Limited · Final report · Jan 26, 2024 · N7473D · Substantial damage
  > An impact with terrain for undetermined reasons.
- [NTSB WPR22LA034](https://openairdocs.org/ntsb/WPR22LA034.md): Bell OH-58A · Molalla, OR · Accident · No injuries · Class 3 · Limited · Final report · Nov 15, 2021 · N103WC · Substantial damage
  > The loss of engine power for undetermined reasons.
- [NTSB WPR20LA201](https://openairdocs.org/ntsb/WPR20LA201.md): Avia Stroitel AC-5M · Bend, OR · Accident · 1 fatal · Class 3 · Limited · Final report · Jun 30, 2020 · N263R · Destroyed
  > A loss of control just after takeoff for reasons that could not be determined based on the available information.
- [NTSB WPR15FA258](https://openairdocs.org/ntsb/WPR15FA258.md): Silvaire Luscombe 8A · Creswell, OR · Accident · 2 fatal · Field investigation · Final report · Sep 7, 2015 · N4948E · Destroyed
  > The pilot's decision to return to the runway shortly after takeoff, and his failure to maintain adequate airspeed during the turn, which resulted in the airplane exceeding its critical angle-of-attack and experiencing an aerodynamic stall and spin.
- [NTSB WPR11FA256](https://openairdocs.org/ntsb/WPR11FA256.md): Bellanca 17-31ATC · Ukiah, OR · Accident · 3 fatal · Field investigation · Final report · Jun 11, 2011 · N79BF · Substantial damage
  > The non-instrument-rated pilot's decision to conduct a visual flight rules flight over mountainous terrain into a region covered by clouds, which likely resulted in spatial disorientation and subsequent loss of airplane control.
- [NTSB WPR10FA388](https://openairdocs.org/ntsb/WPR10FA388.md): Diamond HK36 · Bend, OR · Accident · 1 fatal · Field investigation · Final report · Aug 8, 2010 · N40440 · Substantial damage
  > An condition, which could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation, that prompted the pilot to discontinue the flight. Contributing to the accident…

## 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 s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '000' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/000/sequence?state=OR

---
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.