# Fatal NTSB investigations: Lycoming IO-540 series, IL

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 CEN20FA070](https://openairdocs.org/ntsb/CEN20FA070.md): Piper PA60 · Springfield, IL · Accident · 3 fatal · Class 3 · Field · Final report · Jan 28, 2020 · N6071R · Destroyed
  > The pilot’s failure to follow the instrument landing system (ILS) course guidance during the instrument approach.
- [NTSB CHI03FA181](https://openairdocs.org/ntsb/CHI03FA181.md): Robinson R44 II · Coleta, IL · Accident · 3 fatal · Field investigation · Final report · Jun 25, 2003 · N7512P · Destroyed
  > The pilot not maintaining main rotor RPM during cruise flight. The factor in the two passenger's fatal injuries was the pilot not following directives concerning the prohibition of carrying passengers while a student pilot. Other factors were the pilot's use…
- [NTSB CHI03LA236](https://openairdocs.org/ntsb/CHI03LA236.md): Polsgrove Bluegrass Express · Grafton, IL · Accident · 1 fatal · Limited investigation · Final report · Jan 9, 2003 · N113YE · Destroyed
  > Undetermined.
- [NTSB CHI97FA293](https://openairdocs.org/ntsb/CHI97FA293.md): Keaggy-David Skybolt · Adeline, IL · Accident · 2 fatal · Field investigation · Final report · Sep 12, 1997 · N79DK · Substantial damage
  > The pilot's failure to maintain aircraft control for undetermined reasons.

## 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" = 'IL' AND c."eventCountry" = 'USA'
  AND 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 ('41530', '41585'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41530&fatal=1&state=IL

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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.