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

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 CEN25LA326](https://openairdocs.org/ntsb/CEN25LA326.md): Robinson Helicopter R44 II · Cape Girardeau, MO · Accident · No injuries · Class 3 · Limited · Preliminary report · Aug 16, 2025 · N24DF · Substantial damage
  > On August 16, 2025, at 1150 central daylight time, a Robinson R44 II helicopter, N24DF was substantially damaged when it was involved in an accident near Cape Girardeau, Missouri. The pilot and three passengers were not injured. The helicopter was operated as…
- [NTSB CEN24LA252](https://openairdocs.org/ntsb/CEN24LA252.md): Robinson Helicopter R44 II · New Florence, MO · Accident · No injuries · Class 4 · Limited · Final report · Jul 4, 2024 · N225AM · Substantial damage
  > The pilot’s failure to maintain proper altitude/clearance from a dead tree limb during an aerial application flight.
- [NTSB CEN22LA350](https://openairdocs.org/ntsb/CEN22LA350.md): Robinson Helicopter R44 II · Marshall, MO · Accident · No injuries · Class 4 · Limited · Final report · Jul 31, 2022 · N458SG · Substantial damage
  > The pilot’s failure to adequately survey a field for obstructions prior to a low-level aerial application pass, which resulted in an impact with a powerline.
- [NTSB GAA19CA476](https://openairdocs.org/ntsb/GAA19CA476.md): Robinson R44 · Lebanon, MO · Accident · No injuries · Data collection · Final report · Jun 9, 2019 · N724H · Substantial damage
  > The pilot's loss of yaw control and failure to maintain a proper descent rate and his subsequent improper use of the collective instead of the antitorque pedals to correct the yaw, which resulted in a hard landing.
- [NTSB CEN13FA295](https://openairdocs.org/ntsb/CEN13FA295.md): Robinson Helicopter R44 II · Cross Timbers, MO · Accident · 2 fatal · Field investigation · Final report · May 24, 2013 · N569BC · Destroyed
  > The pilot's failure to see and avoid a power line during the low-altitude flight.
- [NTSB DFW08FA218](https://openairdocs.org/ntsb/DFW08FA218.md): Robinson R44 II · Ridgedale, MO · Accident · 2 fatal · Field investigation · Final report · Aug 29, 2008 · N41411 · Destroyed
  > An in-flight loss of control for undetermined reasons.
- [NTSB CHI08CA023](https://openairdocs.org/ntsb/CHI08CA023.md): Robinson R44 Raven II · Morrison, MO · Accident · No injuries · Data collection · Final report · Oct 19, 2007 · N3246H · Destroyed
  > Loss of control on the ground due to aircraft control not being maintained by the pilot. Contributing factors were the gusting winds and the uneven ground.

## 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" = 'MO' 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=MO

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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.