# NTSB investigations: Lycoming O-540-F1B5, 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 ANC26LA082](https://openairdocs.org/ntsb/ANC26LA082.md): Robinson Helicopter R44 · Macedonia, IA · Accident · Minor injuries · Class 4 · Limited · Investigation open · Aug 9, 2026 · N197HL · Substantial damage
- [NTSB CEN26LA259](https://openairdocs.org/ntsb/CEN26LA259.md): Robinson Helicopter R44 · Adair, IA · Accident · No injuries · Class 3 · Limited · Preliminary report · Jul 18, 2026 · N484AT · Substantial damage
  > On July 18, 2026, about 1440 central daylight time, a Robinson Helicopter Company R44, N484AT, was substantially damaged when it was involved in an accident near Adair, Iowa. The pilot was not injured. The helicopter was operated as a Title 14 Code of Federal…
- [NTSB CEN24LA303](https://openairdocs.org/ntsb/CEN24LA303.md): Robinson Helicopter R44 · Bryant, IA · Accident · No injuries · Class 3 · Limited · Final report · Aug 3, 2024 · N225ML · Substantial damage
  > A loss of engine power during takeoff for reasons that could not be determined, resulting in impact with terrain.
- [NTSB CEN23LA328](https://openairdocs.org/ntsb/CEN23LA328.md): Robinson Helicopter R44 · Hanlontown, IA · Accident · No injuries · Class 4 · Limited · Final report · Jul 26, 2023 · N467HA · Substantial damage
  > The pilot’s failure to maintain clearance from a cable during spray operations.
- [NTSB CEN21LA350](https://openairdocs.org/ntsb/CEN21LA350.md): Robinson Helicopter R44 · Waukon, IA · Accident · Minor injuries · Class 4 · Limited · Final report · Aug 4, 2021 · N775AK · Substantial damage
  > The pilot’s failure to maintain adequate clearance from a powerline during an agricultural application pass.
- [NTSB CEN19LA230](https://openairdocs.org/ntsb/CEN19LA230.md): Robinson R44 · Ida Grove, IA · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 21, 2019 · N459TA · Substantial damage
  > A total loss of engine power during an aerial application flight for undetermined reasons.

## 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 ('42353'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=42353&state=IA

---
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.