# NTSB investigations: Helio H-250: In flight encounter with weather

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 LAX95FA161](https://openairdocs.org/ntsb/LAX95FA161.md): Helio H-250 · Round Mountain, CA · Accident · 2 fatal · Field investigation · Final report · Apr 12, 1995 · N5461E · Destroyed
  > the pilot's poor preflight planning/preparation and in-flight decision by continuing VFR flight into instrument meteorological conditions. The pilot's delay in returning to the departure airport, the low clouds, and low visibility were factors in this…
- [NTSB ANC89LA171](https://openairdocs.org/ntsb/ANC89LA171.md): Helio H-250 · Near Iliamna, AK · Accident · Minor injuries · Limited investigation · Final report · Sep 21, 1989 · N5450E · Substantial damage
  > Inadequate preflight planning/preparation by the pilot and his continued flight into instrument meteorological conditions (IMC). Factors related to the accident were: darkness and adverse weather conditions.

## 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" = 240))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=4300302&occurrence=240

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