# Fatal NTSB investigations: Lycoming O-540-F1B5

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 CEN22FA151](https://openairdocs.org/ntsb/CEN22FA151.md): Robinson Helicopter R44 · Rowlett, TX · Accident · 2 fatal · Class 3 · Field · Final report · Mar 25, 2022 · N514CD · Destroyed
  > A loss of helicopter control while maneuvering, which resulted in main rotor blade contact with the tailboom in flight, tail boom separation, and an uncontrolled descent.
- [NTSB ERA21FA200](https://openairdocs.org/ntsb/ERA21FA200.md): Robinson Helicopter R44 · Wingate, NC · Accident · 1 fatal · Class 3 · Field · Final report · May 2, 2021 · N4528T · Substantial damage
  > The pilot’s failure to maintain clearance from a power line during a low-level aerial application flight, resulting in tail rotor impact with the power line, a loss of control, and subsequent impact with the ground.
- [NTSB ERA21LA191](https://openairdocs.org/ntsb/ERA21LA191.md): Robinson Helicopter R44 · Forkston, PA · Accident · 1 fatal · Class 3 · Limited · Final report · Apr 23, 2021 · N4055N · Destroyed
  > The pilot’s inadequate preflight weather planning, which resulted in an inadvertent encounter with instrument meteorological conditions at night, spatial disorientation, and collision with terrain.
- [NTSB CEN21LA084](https://openairdocs.org/ntsb/CEN21LA084.md): Robinson R44 · Colorado City, TX · Accident · 2 fatal · Class 3 · Limited · Final report · Dec 10, 2020 · N7085Z · Destroyed
  > The pilot’s loss of control and exceedance of performance and/or structural limitations during low-altitude operations, which resulted in an inflight breakup.. Contributing to the accident was the pilot’s impairment from the effects of tetrahydrocannabinol.
- [NTSB WPR19FA123](https://openairdocs.org/ntsb/WPR19FA123.md): Robinson R44 · Kailua, HI · Accident · 3 fatal · Class 3 · Field · Final report · Apr 29, 2019 · N808NV · Destroyed
  > The helicopter’s encounter with a strong downdraft or outflow boundary while operating at a higher than recommended airspeed in turbulence which resulted in a low-G condition, excessive main rotor flapping, and an in-flight breakup when the main rotor…
- [NTSB CEN18FA215](https://openairdocs.org/ntsb/CEN18FA215.md): Robinson Helicopter R44 · Oshkosh, WI · Accident · 1 fatal · Field investigation · Final report · Jun 9, 2018 · N529DW · Substantial damage
  > The pilot's decision to fly over the river at a low altitude and his failure to maintain clearance with wires during low-level flight.
- [NTSB ERA16FA143](https://openairdocs.org/ntsb/ERA16FA143.md): Robinson R44 · Canadensis, PA · Accident · 1 fatal · Field investigation · Final report · Mar 27, 2016 · N776JM · Destroyed
  > The pilot's loss of control due to spatial disorientation, which occurred after ascending in order to clear rising terrain and inadvertently entering the clouds.
- [NTSB ERA13FA186](https://openairdocs.org/ntsb/ERA13FA186.md): Robinson R44 · Miami, FL · Accident · 2 fatal · Field investigation · Final report · Apr 3, 2013 · N3101H · Destroyed
  > The mechanic's failure to properly secure the pitch link hardware of one main rotor blade to the rotating swash plate, which resulted in the pitch link separating in flight and the pilot's subsequent loss of control. Contributing to the accident was the…
- [NTSB ANC10LA053](https://openairdocs.org/ntsb/ANC10LA053.md): Robinson Helicopter R44 · Unalaska, AK · Accident · 1 fatal · Limited investigation · Final report · Jun 20, 2010 · N333DV · Substantial damage
  > The pilot's inappropriate low altitude maneuvering, which resulted in a collision with terrain.
- [NTSB ERA09FA497](https://openairdocs.org/ntsb/ERA09FA497.md): Robinson R44 · Jackson, MS · Accident · 1 fatal · Field investigation · Final report · Sep 1, 2009 · N33PX · Substantial damage
  > The pilot's failure to maintain adequate main rotor rpm, for undetermined reasons.
- [NTSB SEA07FA006](https://openairdocs.org/ntsb/SEA07FA006.md): Robinson R44 · Sumner, WA · Accident · 1 fatal · Field investigation · Final report · Oct 8, 2006 · N769RT · Substantial damage
  > The complete loss of engine power, for undetermined reasons, while on final approach, and the pilot's loss of control of the helicopter after the power loss. Factors include a lake below the final approach to the private landing pad.

## 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."highestInjuryLevel" = 'Fatal'
  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&fatal=1

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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.