# NTSB investigations: Enstrom F-28A, MI

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 CHI02FA001](https://openairdocs.org/ntsb/CHI02FA001.md): Enstrom F-28A · Attica, MI · Accident · 1 fatal · Field investigation · Final report · Oct 3, 2001 · N137E · Substantial damage
  > The reported loss of engine power due to fuel exhaustion during cruise flight, the pilot not performing an autorotation, the pilot not maintaining rotor RPM during his emergency descent, and the pilot not maintaining control of the helicopter. A factor was…
- [NTSB CHI91LA131](https://openairdocs.org/ntsb/CHI91LA131.md): Enstrom F-28A · Grand Ledge, MI · Accident · No injuries · Limited investigation · Final report · Apr 12, 1991 · N294Q · Substantial damage
  > The student's failure to maintain a proper altitude and clearance from the terrain along with the cfi's failure to adequately supervise the student's actions. A factor contributing to the accident was the inadequate visual lookout available due to the night…
- [NTSB CHI88LA014](https://openairdocs.org/ntsb/CHI88LA014.md): Enstrom F-28A · Lapeer, MI · Accident · No injuries · Limited investigation · Final report · Oct 31, 1987 · N9583 · Substantial damage
  > The helicopter was in cruise flt when the rgt side horizontal stabilizer attach tube failed & separated from the tail boom, then contacted the tail rotor. This resulted in failure of the tail rotor drive shaft flex coupling at the tail rotor gear box. In…
- [NTSB CHI84LA209](https://openairdocs.org/ntsb/CHI84LA209.md): Enstrom F-28A · Martin, MI · Accident · No injuries · Limited investigation · Final report · May 25, 1984 · N490H · Substantial damage
  > The plt had landed on a dragstrip after he encountered deteriorating wx. When the wx improved, he took off & attempted to depart over a bleacher area. The plt had difficulty climbing over the bleachers & said 'noticed RPM at 2700, helicopter in a turn.' He…
- [NTSB CHI79FEM23](https://openairdocs.org/ntsb/CHI79FEM23.md): Enstrom F-28A · Albion, MI · Accident · No injuries · Closed · Jun 24, 1979 · N4883 · Substantial damage
- [NTSB CHI77FEC21](https://openairdocs.org/ntsb/CHI77FEC21.md): Enstrom F-28A · Howell, MI · Accident · Serious injuries · Closed · Mar 17, 1977 · N9598 · Destroyed

## 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" = 'MI' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('3300406'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=3300406&state=MI

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