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

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 CEN26LA276](https://openairdocs.org/ntsb/CEN26LA276.md): Robinson Helicopter R44 II · Bennett, IA · Accident · No injuries · Class 3 · Limited · Preliminary report · Aug 2, 2026 · N26KL · Substantial damage
  > On August 2, 2026, about 1318 central daylight time, a Robinson Helicopter Company R44 II helicopter, N26KL, was substantially damaged when it was involved in an accident near Bennett, Iowa. The pilot was not injured. The helicopter was operated as a Title 14…
- [NTSB CEN26LA256](https://openairdocs.org/ntsb/CEN26LA256.md): Robinson Helicopter R44 II · Coralville, IA · Accident · No injuries · Class 4 · Limited · Final report · Jul 16, 2026 · N322TC · Substantial damage
  > The pilot’s failure to maintain clearance from a power line during a low-level aerial application flight.
- [NTSB CEN23LA326](https://openairdocs.org/ntsb/CEN23LA326.md): Robinson Helicopter R44 II · Charles City, IA · Accident · No injuries · Class 4 · Limited · Final report · Jul 26, 2023 · N4174L · Substantial damage
  > The pilot’s improper preflight of the helicopter to ensure that it was within the loading and performance limitations that resulted in settling and impact with terrain during initial climb.
- [NTSB CEN21LA339](https://openairdocs.org/ntsb/CEN21LA339.md): Robinson Helicopter R44 II · West Liberty, IA · Accident · Minor injuries · Class 4 · Limited · Final report · Jul 20, 2021 · N983HA · Substantial damage
  > The pilot’s failure to see and avoid a wire while maneuvering at low altitude during an aerial application flight, resulting in a collision with the wire.
- [NTSB GAA19CA428](https://openairdocs.org/ntsb/GAA19CA428.md): Robinson R44 · Council Bluff, IA · Accident · Minor injuries · Data collection · Final report · Jul 16, 2019 · N124LA · Substantial damage
  > The pilot's improper cyclic input during liftoff from a landing deck, which resulted in the right skid hooking onto an opening on the landing deck and a subsequent dynamic rollover.
- [NTSB GAA18CA453](https://openairdocs.org/ntsb/GAA18CA453.md): Robinson R44 · Elma, IA · Accident · Minor injuries · Data collection · Final report · Jul 27, 2018 · N466EL · Substantial damage
  > The pilot's failure maintain clearance from power lines during an agricultural application flight.

## 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" = 'IA' 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=IA

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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.