# NTSB investigations: Lycoming IO-540-AE1A5: Miscellaneous/other

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 GAA19CA066](https://openairdocs.org/ntsb/GAA19CA066.md): Robinson R44 · Lihue, HI · Accident · No injuries · Data collection · Final report · Nov 10, 2018 · N445KP · Substantial damage
  > The passenger’s improper decision to hold her cell phone outside the helicopter, which resulted in it departing the helicopter and striking the tail rotor.
- [NTSB GAA18CA066](https://openairdocs.org/ntsb/GAA18CA066.md): Robinson Helicopter R44 · New Orleans, LA · Accident · No injuries · Data collection · Final report · Nov 29, 2017 · N744WT · Substantial damage
  > The pilot’s failure to land the helicopter with both skids on the trailer platform, which resulted in a loss of control.
- [NTSB CEN14LA197](https://openairdocs.org/ntsb/CEN14LA197.md): Robinson R44 - II · Menard, TX · Accident · No injuries · Limited investigation · Final report · Mar 23, 2014 · N44MD · Substantial damage
  > The pilot’s inadequate recovery from a practice autorotation, which resulted in an improper touchdown attitude and collision with terrain.
- [NTSB WPR13FA264](https://openairdocs.org/ntsb/WPR13FA264.md): Robinson Helicopter R44 II · Los Angeles, CA · Accident · Minor injuries · Field investigation · Final report · Jun 6, 2013 · N915BW · Substantial damage
  > The pilot’s loss of helicopter control following a precautionary landing, which resulted in a dynamic rollover.
- [NTSB ERA13LA152](https://openairdocs.org/ntsb/ERA13LA152.md): Robinson Helicopter R44 II · Ciales, PR · Accident · Minor injuries · Limited investigation · Final report · Mar 2, 2013 · N834RC · Destroyed
  > A loss of main rotor rpm for reasons that could not be determined because an examination of the helicopter’s engine and associated components did not reveal any mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB ERA11CA180](https://openairdocs.org/ntsb/ERA11CA180.md): Robinson Helicopter R44 II · Weston, FL · Accident · Serious injuries · Data collection · Final report · Mar 5, 2011 · N4168W · Substantial damage
  > The pilot's failure to maintain adequate altitude and physical alertness which resulted in an in-flight collision with the water. Contributing to the accident was the pilot's fatigue.

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41899')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '900'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/900/cases?engine=41899

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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.