# NTSB investigations: Lycoming IGSO-540-B1A, OK

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 FTW83FA299](https://openairdocs.org/ntsb/FTW83FA299.md): Aero Commander 680-F · Norman, OK · Accident · 2 fatal · Field investigation · Final report · Jun 28, 1983 · N6139X · Destroyed
  > The acft crashed after starting a go-around or aborted landing at normal ok. The acft was on a x-country from dallas to wichita. There was no radio communication with the acft after it was cleared to land. The approach looked ok but on short final the acft…
- [NTSB FTW79FA041](https://openairdocs.org/ntsb/FTW79FA041.md): Aero Comdr 680FP · El Reno, OK · Accident · 3 fatal · Closed · Jan 11, 1979 · N2177M · Destroyed
- [NTSB UNK64X1655](https://openairdocs.org/ntsb/UNK64X1655.md): Beech A35 · Bristow, OK · Accident · No injuries · Closed · May 7, 1964 · N576B · 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" = 'OK' 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 ('41535'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41535&state=OK

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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.