# NTSB investigations: Lycoming IO-360-A1D6, WY

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 WPR26LA048](https://openairdocs.org/ntsb/WPR26LA048.md): Aviat A1 · Evanston, WY · Accident · Serious injuries · Class 4 · Limited · Final report · Oct 4, 2025 · N96WJ · Substantial damage
  > The airplane’s encounter with downdrafts in mountainous terrain, which resulted in a collision with terrain. Contributing to the accident was the pilot’s decision to continue the flight through mountainous terrain in marginal weather conditions.
- [NTSB WPR11CA396](https://openairdocs.org/ntsb/WPR11CA396.md): Aviat A-1C-200 · Casper, WY · Accident · No injuries · Data collection · Final report · Aug 19, 2011 · N53WY · Substantial damage
  > The pilot's failure to maintain directional control during landing.

## 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" = 'WY' 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 ('41822'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41822&state=WY

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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.