# NTSB investigations: Lycoming HIO-360 series, WA

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 WPR11LA325](https://openairdocs.org/ntsb/WPR11LA325.md): Hughes 269C · Wenatchee, WA · Accident · Minor injuries · Limited investigation · Final report · Jul 12, 2011 · N3623Z · Substantial damage
  > The pilot's failure to maintain control while hovering out of ground effect at low altitude, which resulted in the helicopter settling into trees.
- [NTSB SEA04LA128](https://openairdocs.org/ntsb/SEA04LA128.md): Hughes 269C · Arlington, WA · Accident · No injuries · Limited investigation · Final report · Jul 10, 2004 · N56PH · Substantial damage
  > A significant power loss for undetermined reasons while in cruise flight, leading to a full autorotational landing. Factors include no suitable terrain in the area, and soft swampy terrain at the point where the pilot found it necessary to perform the forced…
- [NTSB SEA03LA151](https://openairdocs.org/ntsb/SEA03LA151.md): Hughes 269C · Snohomish, WA · Accident · No injuries · Limited investigation · Final report · Jul 24, 2003 · N53KF · Substantial damage
  > The dual students failure to maintain clearance from the terrain during the go-around from a simulated autorotational flare, and the instructor pilot's failure to take adequate remedial action to keep the dual student from allowing the aircraft to impact the…
- [NTSB SEA02LA150](https://openairdocs.org/ntsb/SEA02LA150.md): Hughes 269A · Covington, WA · Accident · No injuries · Limited investigation · Final report · Aug 10, 2002 · N90271 · Substantial damage
  > Aircraft control not maintained while hovering.
- [NTSB SEA00LA103](https://openairdocs.org/ntsb/SEA00LA103.md): Enstrom F-28C · Kennewick, WA · Accident · No injuries · Limited investigation · Final report · Jun 8, 2000 · N80193 · Substantial damage
  > The pilot's exceedance of the helicopter's hovering capabilities in a downwind hover. Factors included tailwind conditions, the pilot's lack of experience in the type of operation being conducted, and trees in the area where the helicopter settled.
- [NTSB SEA97FA003](https://openairdocs.org/ntsb/SEA97FA003.md): Enstrom F-28C · Spokane, WA · Accident · No injuries · Field investigation · Final report · Oct 5, 1996 · N574H · Substantial damage
  > a loss of engine power for undetermined reasons.
- [NTSB SEA93FA178](https://openairdocs.org/ntsb/SEA93FA178.md): Enstrom F-28C · Seattle, WA · Accident · No injuries · Field investigation · Final report · Aug 18, 1993 · N86198 · Substantial damage
  > Shorted magneto condensers. Factors include a hidden obstruction in the landing area, and a reduction in rotor RPM from attempting to avoid the obstruction.
- [NTSB SEA90LA116](https://openairdocs.org/ntsb/SEA90LA116.md): Enstrom F28C · Camas, WA · Accident · No injuries · Limited investigation · Final report · Jun 7, 1990 · N51729 · Substantial damage
  > The failure of a sprag clutch in the rotor-drive mechanism, at an altitude and position that precluded or limited the possibility of a successful outcome.
- [NTSB SEA85LA079](https://openairdocs.org/ntsb/SEA85LA079.md): Hughes 269C · Elma, WA · Accident · No injuries · Limited investigation · Final report · Mar 20, 1985 · N9592F · Substantial damage
  > Just prior to lift-off a vibration accompanied by lateral rocking occurred. Although the plt brought the power to idle. The helicopter had already started to come apart. During engine examination it was found that the ground resonance occurred due to under to…
- [NTSB SEA84LA153](https://openairdocs.org/ntsb/SEA84LA153.md): Hughes 269C · Mt. St. Helens, WA · Accident · Minor injuries · Limited investigation · Final report · Jul 2, 1984 · N58397 · Destroyed
  > This accident occurred at the 5500 ft level on Mt. St. Helens. Density alt at the time was 7500 ft. at aprx 40-50 ft aglengine and rotor RPM began to decay rapidly. The acft landed hard on a rock ledge with one skid partially off the ledge. As rotor RPM…
- [NTSB SEA81FYP28](https://openairdocs.org/ntsb/SEA81FYP28.md): Enstrom F-28C · Rice, WA · Accident · Minor injuries · Closed · Jul 21, 1981 · N5689M · Destroyed
- [NTSB SEA77DYK20](https://openairdocs.org/ntsb/SEA77DYK20.md): Enstrom F28C · Medford, WA · Accident · No injuries · Closed · Jul 22, 1977 · N51727 · Substantial damage

## 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" = 'WA' 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 ('41524'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41524&state=WA

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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.