# NTSB investigations: Lycoming HI0-360 series, CO

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 CEN15FA126](https://openairdocs.org/ntsb/CEN15FA126.md): Enstrom 280FX · Erie, CO · Accident · 2 fatal · Field investigation · Final report · Jan 26, 2015 · N86235 · Destroyed
  > An in-flight failure of the helicopter's #2 main rotor spindle due to undetected fatigue cracking, which resulted in an in-flight breakup. Contributing to failure were the nonconforming thread root radius of the spindle and the manufacturer's failure to…
- [NTSB DEN06CA048](https://openairdocs.org/ntsb/DEN06CA048.md): Enstrom 280F · Peetz, CO · Accident · No injuries · Data collection · Final report · Mar 15, 2006 · N811Z · Substantial damage
  > The pilot's failure to maintain aircraft control while maneuvering resulting in an impact with terrain. Contributing factors were the gusty winds, downdrafts, and box canyon.
- [NTSB DEN99LA173](https://openairdocs.org/ntsb/DEN99LA173.md): Enstrom 280C · Longmont, CO · Accident · No injuries · Limited investigation · Final report · Sep 30, 1999 · N84DH · Substantial damage
  > An inaccurate touchdown during a full autorotation, which resulted in main rotor flex which cut off the tail boom. Factors were the pilot's lack of total experience in helicopters and high density altitude.
- [NTSB FTW96LA291](https://openairdocs.org/ntsb/FTW96LA291.md): Enstrom 280C · Castle Rock, CO · Accident · No injuries · Limited investigation · Final report · Jul 3, 1996 · N51763 · Substantial damage
  > Total failure of the magneto. A factor was the pilot operating the helicopter with a known deficiency.
- [NTSB DEN89LA120](https://openairdocs.org/ntsb/DEN89LA120.md): Enstrom 280C · Colorado Spgs, CO · Accident · Minor injuries · Limited investigation · Final report · May 17, 1989 · N624H · Substantial damage
  > Inadequate compensation for the wind conditions by the pilot. The high density altitude and wind conditions were contributing factors.

## 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" = 'CO' 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 ('41553'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41553&state=CO

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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.