# NTSB investigations: Lycoming IO-540-AE1A5, NV

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 WPR25LA110](https://openairdocs.org/ntsb/WPR25LA110.md): Robinson Helicopter R44 II · Las Vegas, NV · Accident · Minor injuries · Class 3 · Limited · Final report · Mar 10, 2025 · N44KY · Substantial damage
  > The pilot’s loss of helicopter control after the door opened during takeoff. Contributing to the accident was the pilot’s failure to confirm that the door was properly closed before departure.
- [NTSB WPR23LA145](https://openairdocs.org/ntsb/WPR23LA145.md): Robinson Helicopter R44 II · Elko, NV · Accident · No injuries · Class 4 · Limited · Final report · Apr 1, 2023 · N462BA · Substantial damage
  > The pilot’s failure to maintain sufficient altitude and airspeed in gusting tailwind conditions that resulted in an unrecoverable descent and impact with terrain.
- [NTSB WPR14LA353](https://openairdocs.org/ntsb/WPR14LA353.md): Robinson Helicopter R44 II · Pahrump, NV · Accident · Minor injuries · Limited investigation · Final report · Aug 24, 2014 · N4246Z · Substantial damage
  > A total loss of engine power during a practice autorotation for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB WPR12CA162](https://openairdocs.org/ntsb/WPR12CA162.md): Robinson Helicopter R44 II · Henderson, NV · Accident · No injuries · Data collection · Final report · Apr 9, 2012 · N55NZ · Substantial damage
  > The pilot did not maintain directional and yaw control of the helicopter during approach and landing, which resulted in a dynamic rollover.

## 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" = 'NV' 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 ('41899'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41899&state=NV

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