# NTSB investigations: Lycoming HIO-360 series, 1984

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 LAX85LA063](https://openairdocs.org/ntsb/LAX85LA063.md): Hughes 269C · Boulevard, CA · Accident · No injuries · Limited investigation · Final report · Dec 8, 1984 · N8663F · Substantial damage
  > Plt was executing low level photographic survey of valleys in mountainous terrain. Acft entered a narrow valley with steeply rising terrain ahead. When plt realized excessive rate of climb would be required to clear obstacles, he attempted a steep turn-around…
- [NTSB MKC84LA265](https://openairdocs.org/ntsb/MKC84LA265.md): Hughes 269C · Witts Springs, AR · Accident · No injuries · Limited investigation · Final report · Aug 29, 1984 · N7487F · Substantial damage
  > While manuevering at an alt of 35 to 40 ft above tree the plt felt a shutter and low frequency shaking of the rotor disk. Rotor RPM and engine RPM decreased and the acft entered a shallow descent. The plt applied forward cyclic, reduced collective and…
- [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…

## 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 year(c."eventDate") = 1984
  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&year=1984

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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.