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

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 WPR24LA241](https://openairdocs.org/ntsb/WPR24LA241.md): Robinson Helicopter R44 II · Herriman, UT · Accident · No injuries · Class 3 · Limited · Final report · Jul 13, 2024 · N6960 · Substantial damage
  > A hard landing following a total loss of engine power due to fuel starvation as a result of the improper idle setting of the helicopter’s engine. Contributing to the loss of engine power was the instructor’s reduction of engine power past that recommended by…
- [NTSB WPR22LA267](https://openairdocs.org/ntsb/WPR22LA267.md): Robinson Helicopter R44 II · Cedar City, UT · Accident · Minor injuries · Class 4 · Limited · Final report · Jul 25, 2022 · N497SU · Substantial damage
  > The student pilot’s failure to maintain rotor rpm and airspeed and the flight instructor's inadequate remedial action to regain helicopter control during the straight-in autorotation which resulted in a hard landing.
- [NTSB WPR16LA165](https://openairdocs.org/ntsb/WPR16LA165.md): Robinson Helicopter R44 II · Gunnison, UT · Accident · No injuries · Limited investigation · Final report · Aug 12, 2016 · N247DB · Substantial damage
  > A total loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB WPR15FA051](https://openairdocs.org/ntsb/WPR15FA051.md): Robinson Helicopter R44 · Bountiful, UT · Accident · 2 fatal · Field investigation · Final report · Dec 2, 2014 · N3234U · Substantial damage
  > The pilot/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 a subsequent loss of control.
- [NTSB WPR09FA076](https://openairdocs.org/ntsb/WPR09FA076.md): Robinson Helicopter R44 II · West Valley City, UT · Accident · Serious injuries · Field investigation · Final report · Jan 9, 2009 · N168SH · Substantial damage
  > The pilot’s inadvertent VFR flight into IMC conditions, which resulted in his spatial disorientation and loss of control of the helicopter. Also causal was the flight instructor’s delay in taking remedial action.
- [NTSB SEA08CA002](https://openairdocs.org/ntsb/SEA08CA002.md): Robinson R44 II · Lake Powell, UT · Accident · Minor injuries · Data collection · Final report · Oct 2, 2007 · N644BS · Substantial damage
  > The pilot's inadequate preflight inspection and failure to remove a tie-down strap before departure.

## 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" = 'UT' 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=UT

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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.