# Fatal NTSB investigations: Lycoming IO-520 series

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 ERA23FA113](https://openairdocs.org/ntsb/ERA23FA113.md): Beech A36 · North Castle, NY · Accident · 2 fatal · Class 3 · Field · Final report · Jan 19, 2023 · N19MT · Substantial damage
  > The pre-ignition/detonation damage to the No. 4 piston for reasons that could not be determined, which allowed the crankcase to become pressurized and resulted in oil exhaustion and subsequent catastrophic internal engine failure.
- [NTSB ERA14WA304](https://openairdocs.org/ntsb/ERA14WA304.md): Cessna U206E · Cerro Militar, Municipio de Calima, Colombia · Accident · 3 fatal · Foreign investigation · Jun 19, 2014 · N4258 · Substantial damage
- [NTSB LAX08FA092](https://openairdocs.org/ntsb/LAX08FA092.md): Beech 95-B55 · Benson, AZ · Accident · 2 fatal · Field investigation · Final report · Apr 3, 2008 · N20480 · Substantial damage
  > The pilot's misjudged speed and altitude during approach that led to a long landing and his subsequent failure to maintain control during an attempted go-around. Contributing to the accident were the dark night, the pilot's low total night flight experience,…

## 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."highestInjuryLevel" = 'Fatal'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41584'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41584&fatal=1

---
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.