# NTSB investigations: Enstrom F-28A: Airframe/component/system failure/malfunction

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 NYC98LA076](https://openairdocs.org/ntsb/NYC98LA076.md): Enstrom F-28A · Blue Ash, OH · Accident · No injuries · Limited investigation · Final report · Mar 12, 1998 · N4884 · Substantial damage
  > The failure of a cooling fan blade and the pilot's improper flare.
- [NTSB MIA90LA120](https://openairdocs.org/ntsb/MIA90LA120.md): Enstrom F-28A · Marathon, FL · Accident · No injuries · Limited investigation · Final report · May 13, 1990 · N9056 · Substantial damage
  > Failure of the input drive gear of the tail rotor gear box for undetermined reasons because the drive gear was not recovered from the ocean.
- [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 CHI84IA294](https://openairdocs.org/ntsb/CHI84IA294.md): Enstrom F-28A · Muncie, IN · Incident · No injuries · Incident investigation · Final report · Jul 3, 1984 · N13CM · Minor damage
  > According to the plt, he was in a 20 deg left bank with an airspeed of about 40 KTS when the helicopter began rotation to the right. He entered an autorotation & landed with a forward speed of about 5 KTS. An exam revealed that the tail rotor drive shaft had…

## 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 ('3300406')
    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" = 130))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=3300406&occurrence=130

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