# NTSB investigations: Lycoming GO-435C&D series, WA

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 SEA02FA036](https://openairdocs.org/ntsb/SEA02FA036.md): Aero Commander 520 · Puyallup, WA · Accident · Serious injuries · Field investigation · Final report · Feb 2, 2002 · N520SE · Substantial damage
  > The pilot's failure to maintain aircraft control during takeoff. Trees were a factor.
- [NTSB SEA82FYE30](https://openairdocs.org/ntsb/SEA82FYE30.md): Helio H-391B · Bellingham, WA · Accident · No injuries · Closed · May 29, 1981 · N316HW · Substantial damage
- [NTSB SEA67F0274](https://openairdocs.org/ntsb/SEA67F0274.md): Beech B50 · Wenatchee, WA · Accident · No injuries · Closed · Apr 3, 1967 · N104W · Substantial damage
- [NTSB UNK64X1390](https://openairdocs.org/ntsb/UNK64X1390.md): Aero Comm 520 · Brewster, WA · Accident · No injuries · Closed · Apr 20, 1964 · N4154B · Substantial 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" = 'WA' 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 ('41521'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41521&state=WA

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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.