NTSB investigations: Helio HT-295

7 cases on aircraft the registry lists as Helio HT-295. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.

Defining event

Finding

Phase of flight

Aircraft model

Cases per year

19742026

NTSB investigations: Helio HT-295 per year, 1974–2026: 7 cases
1974	2
1981	1
1988	1
1995	1
2021	1
2025	1

Where

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Latest cases

Query with 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 ('4300803')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

duckdb -csv -c "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 ('4300803'))
  ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

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 ('4300803'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.

NTSB ERA25LA091Accident · No injuriesClass 3 · LimitedFinal reportHelio HT-295 · Marion, OHThe failure of the right main landing gear spring due to intergranular stress-corrosion cracking that progressed into fatigue. Contributing to the accident was the improper rework of the spring at an undetermined time.Jan 5, 2025 · N18JC · Substantial damage NTSB GAA21WA226Accident · Minor injuriesClass 5 · ForeignHelio HT-295 · Pista Del, GuatemalaSep 13, 2021 · N808BD NTSB FTW96LA035Accident · Serious injuriesLimited investigationFinal reportHelio HT-295 · Llano, TXThe pilot's encounter with a downdraft and his inability to outclimb rising terrain. Factors were the rising terrain and high winds.Nov 1, 1995 · N68889 · Destroyed NTSB LAX88LA123Accident · No injuriesLimited investigationFinal reportHelio HT-295 · Oracle, AZEngine failure for undetermined reasons.Mar 10, 1988 · N68871 · Destroyed NTSB FTW81FPD13Accident · No injuriesClosedHelio HT-295 · Grayford, TXFeb 3, 1981 · N5399G · Substantial damage NTSB MIA75DLG17Accident · No injuriesClosedHelio Acft H-295 · Cross Anchor, SCNov 2, 1974 · N68880 · Substantial damage NTSB MIA75DKA01Accident · No injuriesClosedHelio Acft H-295 · Mayaguez, PRSep 8, 1974 · N68870 · Substantial damage