# NTSB investigations: Lycoming VO-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 CHI95LA270](https://openairdocs.org/ntsb/CHI95LA270.md): Bell 47 · Arlington Hts, IL · Accident · Minor injuries · Limited investigation · Final report · Aug 12, 1995 · N4032G · Substantial damage
  > plot misjudged the flare. The factors included the pilot getting too close to the lead helicopter, allowing his airspeed to get too slow, and encountering settling with power.
- [NTSB CHI83LA292](https://openairdocs.org/ntsb/CHI83LA292.md): Bell 47G-4A · Wheeler, IL · Accident · No injuries · Limited investigation · Final report · Jul 5, 1983 · N7069J · Substantial damage
  > The plt reported that while he was returning for another load of chemicals, the eng missed a couple of times, then smoothed out for about 1 min. After that, the eng missed again, then quit while the helicopter was at aprx 150 ft AGL. The plt chose to clear…
- [NTSB CHI76FEV32](https://openairdocs.org/ntsb/CHI76FEV32.md): Hiller Acft UH-12D · Eldred, IL · Accident · No injuries · Closed · Apr 29, 1976 · N62417 · Substantial damage
- [NTSB CHI76FCA06](https://openairdocs.org/ntsb/CHI76FCA06.md): Hiller UH-12D · St Jacob, IL · Accident · No injuries · Closed · Mar 15, 1976 · N62417 · Substantial damage
- [NTSB CHI75DCA06](https://openairdocs.org/ntsb/CHI75DCA06.md): Hiller Acft UH12D · Lebanon, IL · Accident · No injuries · Closed · Apr 15, 1975 · N62417 · Substantial damage
- [NTSB CHI69F0360](https://openairdocs.org/ntsb/CHI69F0360.md): Bell 47G-4A · Chicago, IL · Accident · No injuries · Closed · Oct 26, 1968 · N4032G · 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" = 'IL' 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 ('41534', '41582'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41534&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.