# NTSB investigations: Lycoming VO-540 series, 1971

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 LAX72AL018](https://openairdocs.org/ntsb/LAX72AL018.md): Hiller Acft UH12L4 · Grnd Canyon, AZ · Accident · Minor injuries · Closed · Sep 1, 1971 · N90486 · Destroyed
- [NTSB SEA72DYA07](https://openairdocs.org/ntsb/SEA72DYA07.md): Hiller UH12-E · Bliss, ID · Accident · No injuries · Closed · Jul 23, 1971 · N5345V · Substantial damage
- [NTSB SEA72FYE03](https://openairdocs.org/ntsb/SEA72FYE03.md): Hiller 12E · Skykomish, WA · Accident · 1 fatal · Closed · Jul 16, 1971 · N9749C · Destroyed
- [NTSB LAX72FUA02](https://openairdocs.org/ntsb/LAX72FUA02.md): Bell 47J-2 · Hntngtn Bch, CA · Accident · No injuries · Closed · Jul 7, 1971 · N2097 · Substantial damage
- [NTSB NYC71FHD49](https://openairdocs.org/ntsb/NYC71FHD49.md): Bell 47G2A1 · Berlin, NJ · Accident · No injuries · Closed · May 18, 1971 · N73953 · Substantial damage
- [NTSB LAX71FVQ74](https://openairdocs.org/ntsb/LAX71FVQ74.md): Bell 47J2 · Sta Barbara, CA · Accident · Minor injuries · Closed · Apr 10, 1971 · N73921 · Substantial damage
- [NTSB MIA71DM066](https://openairdocs.org/ntsb/MIA71DM066.md): Hiller UH12E4 · Naguabo, PR · Accident · No injuries · Closed · Jan 24, 1971 · N44B · 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 year(c."eventDate") = 1971
  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&year=1971

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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.