# NTSB investigations: Enstrom F-28C: Loss of engine power(total) - mech failure/malf

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 FTW97LA094](https://openairdocs.org/ntsb/FTW97LA094.md): Enstrom F-28C · Lake Jackson, TX · Accident · No injuries · Limited investigation · Final report · Jan 30, 1997 · N51774 · Destroyed
  > The failure of the #2 cylinder for an undetermined reason which resulted in an exhaust leak that melted an oil line.
- [NTSB SEA93FA178](https://openairdocs.org/ntsb/SEA93FA178.md): Enstrom F-28C · Seattle, WA · Accident · No injuries · Field investigation · Final report · Aug 18, 1993 · N86198 · Substantial damage
  > Shorted magneto condensers. Factors include a hidden obstruction in the landing area, and a reduction in rotor RPM from attempting to avoid the obstruction.
- [NTSB CHI93LA212](https://openairdocs.org/ntsb/CHI93LA212.md): Enstrom F-28C · Buckner, MO · Accident · Serious injuries · Limited investigation · Final report · Jun 14, 1993 · N51717 · Substantial damage
  > The nut backing off the connecting rod bolt resulting in rod failure. A factor involved in this accident was the lack of suitable terrain for the pilot in command to make a run on landing.
- [NTSB SEA90LA116](https://openairdocs.org/ntsb/SEA90LA116.md): Enstrom F28C · Camas, WA · Accident · No injuries · Limited investigation · Final report · Jun 7, 1990 · N51729 · Substantial damage
  > The failure of a sprag clutch in the rotor-drive mechanism, at an altitude and position that precluded or limited the possibility of a successful outcome.
- [NTSB DEN85LA094](https://openairdocs.org/ntsb/DEN85LA094.md): Enstrom F-28L · Salt Lake City, UT · Accident · No injuries · Limited investigation · Final report · Mar 14, 1985 · N51671 · Substantial damage
  > The acft eng lost pwr on final apch at aprx 100 ft AGL. The tail boom was severed during the autorotational landing on soft ground. Post accident exam of the eng revealed that the left magneto point gap was excessively closed. During eng test run, when the…
- [NTSB DEN82DA089](https://openairdocs.org/ntsb/DEN82DA089.md): Enstrom F-28C · Marmath, ND · Accident · No injuries · Final report · May 17, 1982 · N8617J · Substantial damage
  > The pilot reported that while he was in flight at about 75 to 80 ft AGL, the engine lost power. During an autorotative landing in an open pasture, a skid dug into the ground and the helicopter rolled over. A subsequent engine teardown revealed evidence that…

## 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 ('3300407')
    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" = 351))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=3300407&occurrence=351

---
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.