# NTSB investigations: Lycoming VO-540 series, AL

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 MIA98FA229](https://openairdocs.org/ntsb/MIA98FA229.md): Bell 47G-4A · Carrollton, AL · Accident · No injuries · Field investigation · Final report · Aug 23, 1998 · N7162M · Substantial damage
  > The pilots failure to follow written instructions in the flight manual for an engine failure, and the improper use of flight controls (cyclic/collective) during an autorotation resulting in a hard landing, and collision of the main rotor blades with the…
- [NTSB ATL82DA214](https://openairdocs.org/ntsb/ATL82DA214.md): Hiller UH-12E · Centre, AL · Accident · No injuries · Final report · Jul 13, 1982 · N28872 · Substantial damage
  > While returning from a spraying operation, the pilot was flying low toward the rising sun when the helicopter collided with power lines. An autorotation was initiated, but the skids collapsed during the landing.
- [NTSB MIA79FKJ42](https://openairdocs.org/ntsb/MIA79FKJ42.md): Hiller UH-12E · Verbena, AL · Accident · Serious injuries · Closed · Jun 8, 1979 · N87600 · Substantial damage
- [NTSB MIA76DKJ77](https://openairdocs.org/ntsb/MIA76DKJ77.md): Bell 47G-4 · Natural Bridge, AL · Accident · Minor injuries · Closed · Jun 28, 1976 · N1216W · 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" = 'AL' 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=AL

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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.