# NTSB investigations: Lycoming GO-435C&D series: In flight encounter with weather

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 BFO89FA069](https://openairdocs.org/ntsb/BFO89FA069.md): Beech B50 · Church Creek, MD · Accident · 3 fatal · Field investigation · Final report · Aug 23, 1989 · N3688B · Destroyed
  > VFR flight into IMC and pilot disorientation, which resulted in the loss of aircraft control. Contributing to the accident was the pilot's lack of instrument experience, darkness, and the adverse weather condition.
- [NTSB FTW84FA047](https://openairdocs.org/ntsb/FTW84FA047.md): Aero Commander 520 · Clines Corners, NM · Accident · 2 fatal · Field investigation · Final report · Nov 9, 1983 · N4116B · Destroyed
  > The non-instrument rated plt was on ferry flt from bartlesville, ok to ontario, CA. An en route stop was made at tucumcari, NM, where the acft was refueled & 14 qts of oil was added to the left eng. The line boy who serviced the acft saw no visible oil leaks…

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41521')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 240))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41521&occurrence=240

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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.