# NTSB investigations: Helio H-250: Loss of control - in flight

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 ANC84FA116](https://openairdocs.org/ntsb/ANC84FA116.md): Helio H-250 · Fairbanks, AK · Accident · No injuries · Field investigation · Final report · Jul 17, 1984 · N6321V · Substantial damage
  > The acft nosed up after takeoff to an aprx 75 deg pitch angle in spite of nose down control input. The plt pulled off all power and the acft fell to the ground. Post accident investigation revealed that the acft was about 392 lbs over gross weight and 5.13…
- [NTSB ANC84LA034](https://openairdocs.org/ntsb/ANC84LA034.md): Helio H-250 · Iliamna, AK · Accident · Serious injuries · Limited investigation · Final report · Feb 1, 1984 · N5966X · Substantial damage
  > According to witnesses, the ski equipped acft took off toward the north. They reported that after taking off, the acft made a tight left turn, then spiraled to the ground. They estimated that the maximum alt was aprx 150 ft. also, they reported that the eng…

## 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.aircraft_model_code IN ('4300302')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 250))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4300302&occurrence=250

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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.