# NTSB investigations: Lycoming VO-540 series, PR

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 ATL02FA107](https://openairdocs.org/ntsb/ATL02FA107.md): Bell 47G-4A · Yauco, PR · Accident · 1 fatal · Field investigation · Final report · May 25, 2002 · N6SR · Destroyed
  > The pilot's failure to apply carburetor heat that resulted in a partial loss of engine power and the subsequent collision with an object during the forced landing. A factor was weather conditions favorable for the formation of carburetor ice.
- [NTSB MIA71DM066](https://openairdocs.org/ntsb/MIA71DM066.md): Hiller UH12E4 · Naguabo, PR · Accident · No injuries · Closed · Jan 24, 1971 · N44B · Substantial damage
- [NTSB MIA69F0004](https://openairdocs.org/ntsb/MIA69F0004.md): Hiller UH-12 · Manati, PR · Accident · Serious injuries · Closed · May 17, 1968 · N9790C · Destroyed
- [NTSB MIA65A0094](https://openairdocs.org/ntsb/MIA65A0094.md): Hiller UH12E · San Sebastian, PR · Accident · No injuries · Closed · Mar 26, 1965 · N5363V · 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" = 'PR' 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=PR

---
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.